Is trillion the new billion?

2011-10-29 10:09:21

The eurozone's bailout fund now stands at one trillion euros ( 880bn or $1.4tn)

after a deal was thrashed out in Brussels by European leaders. The figure of

one trillion has become increasingly widely used but do we really understand

it?

Once a representation of something beyond our comprehension, the word trillion

- 1,000,000,000,000 - has now sealed its place in common parlance.

As US politicians were trying to find budget savings of $1.2tn, European

leaders were topping up their rescue fund to the tune of 1tn euros.

A combination of economic progress and inflation means larger and larger

numbers are needed to define financial sums, and a billion is no longer the

benchmark. So how did trillion take over?

The words billion and trillion, or variations on them, were first documented by

French mathematicians in the 15th Century.

A trillion was 1,000,000,000,000,000,000, or the third power of a million. The

US later adopted what became known as the short scale, which reduced a trillion

to 1,000,000,000,000 (and a billion to 1,000,000,000), but the British retained

the old system until the 1970s.

How billions and trillions changed

image of Susie Dent Susie Dent Lexicographer

In 1690, the philosopher John Locke suggested the French word billion as a

useful term for avoiding "the often repeating of millions of millions of

millions etc". The French had purposely coined "billion" a 100 or so years

earlier to denote the second power of a million ("bi" being the standard prefix

for two).

However the application of the word was subsequently changed by French

arithmeticians, so that the terms "billion" and "trillion" denoted not the

second and third powers of a million, but a thousand millions and a thousand

thousand millions. This system was adopted by the US. Britain, however,

retained the original (and etymologically correct) use.

In 1974, Harold Wilson pledged that the British government would adopt the

"short scale" naming system used in the US to avoid ambiguity. As a result, the

value of billion is now generally understood to mean a thousand millions.

Nonetheless this is still a bone of contention for many, and the older sense "a

million millions" is still common.

At that point, the word trillion was rarely mentioned in the news and resided

more in the imagination of children, alongside zillions and gazillions, as an

expression of something on an enormous scale.

It was more commonly used in the US. The New York Times, for instance,

anticipated the US economy in 1970 would soon surpass $1tn. But it only cropped

up in the British media with regularity in the 1980s, in reference to the yen

or the lira.

But the last few years has seen its increasing use and it has now supplanted a

billion, says James Abdey, a fellow of statistics at London School of

Economics.

"When it was first used in the 1970s it had shock value. The first time someone

hears the word trillion, they might not know the number of zeros but they know

it's a big number. But the figures are now bandied around in the media and it's

devalued its importance."

The US is more used to the term, due to the size of its economy and its

spending power.

"'Trillion' does seem to have much more currency than it used to, probably

because of the costs of the Iraq and Afghanistan wars and the budget and

deficit," says John Allen Paulos a professor of mathematics at Temple

University in Philadelphia.

"This doesn't mean that most people have a visceral grasp of its size. It'd be

interesting to have the presidential candidates asked during a debate, How many

millions in a trillion? I suspect at least some of them would try to deflect

the question with a joke. And emotion trumps the numbers as usual. A few

million dollars spent on some hot-button issue often arouses more ire than a

trillion-dollar war."

The big numbers divide

Short scale: US, UK, Australia, Russia, Brazil, Turkey, Ireland, English Canada

and others

Long scale: France, Italy (both switched to short then back to long), Spain,

Germany, French Canada and others

It's not only in the more affluent countries that the word has risen to

prominence. Living in Zimbabwe during the height of its inflation problems in

2008, people became used to talking about their daily expenses in terms of

trillions.

Elsewhere, economic growth has driven an inexorable rise in numbers, says

economist Andrew Dilnot. "The speed of change you get from quite small annual

growth is what catches us all out. If something is growing at 10% a year then

it doubles every seven-and-a-quarter years."

But increased use has not enhanced understanding, he says. "My guess is that

most people really struggle to have a clear idea of what a trillion is. I have

to sit down and think pretty hard how many noughts there are.

"The answer I think is what we mean is 1,000 billion, which has 12 noughts.

Some people still think a billion is a million-million, which is really a

trillion, and they think a trillion is something else. So the honest answer is

people just see a trillion and think it's a very, very big number."

About 20 years ago, a study suggested Italians were much more comfortable with

big numbers than the British because of the lira, says Mr Dilnot, and despite

the increased use of trillion in British discourse (most commonly about debt),

the UK's national income is described as 1,500bn not 1.5tn, because the UK

understands billions better.

The new trillions

Trillion - 1 + 12 zeros

Quadrillion - 1 + 15 zeros

Quintillion - 1 + 18 zeros

Sextillion - 1 + 21 zeros

Septillion - 1 + 24 zeros

Octillion - 1 + 27 zeros

Nonillion - 1 + 30 zeros

Decillion - 1 + 33 zeros

Numbers in short scale

One way to enhance understanding is to divide a big number by the number of

people affected, he says, so if the population of the eurozone is about 330m,

then a trillion shared represents about 3,000 euros for each person. Another

way is to count the numbers one at a time, one per second. A million seconds is

11 days, a billion seconds is about 32 years and a trillion seconds is 32,000

years.

As well as the mathematical reality that numbers really are getting bigger,

there is also a wilful repetition of words like trillion, says lexicographer

Susie Dent.

"The use of 'trillions' in our general conversation is part of a trend towards

linguistic inflation or 'bigging up'.

"Some words are used to the point of exhaustion and need replacing with others

in order to maintain the strength of expression. So 'heroes' are now

'superheroes', we're not just angry any more, we are 'incandescent with rage',

and 'tragedy' is losing its power because it's used for less than tragic

events.

And words which previously had sufficient power in themselves are attracting

prefixes such as uber- or mega- in order to re-energise them, she adds.

"'Trillion' has become a bit of a throw-away for a large amount."

Next up, quadrillion.