In the US, there are 9 zeros in a billion and 12 in a trillion.
In some parts of Europe and in Latin America, there are 12 zeros in a billion and 18 in a trillion. This scale was used in the UK until 1974, but rarely since.
Short Scale and Long Scale
The "short scale" used in the US and elsewhere assigns number names (thousand, million, billion, trillion, quadrillion) by thousands.
On the short scale, there are 12 zeros in a trillion (1012). It is 1,000,000,000,000.
The traditional long scale, used in many non-English areas of the world, advances number names by millions, with intermediate names for the thousands (milliard, billiard, trilliard). On the long scale, a billion is a million million, and a trillion is a million billion.
On the long scale, there are 18 zeros in a trillion (1018). It is 1,000,000,000,000,000,000.
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It has 21 zeros, because 'Giga' means 'a Billion'. Thus, one GigaTrillion is 1 Billion-Trillion. A billion has 9 zeros, and a trillion has 12 zeros. However, if you are referring to the United Kingdom, a billion has 12 zeros and a trillion has 18 zeros, so it would be 30 zeros.
The easiest way to write that number only uses a single zero:1 billion trillion = 1 x 1021If it's a lot of zeros you're after, you ought to sit down one rainy afternoon,take a piece of paper, and just write the number "one googol". That's a ' 1 ',with a hundred zeros after it. (Don't forget to write the comma, before eachset of three zeros, starting at the end and working back towards the ' 1 '.)1 billion = 1,000,000,0001 trillion = 1,000,000,000,0001 billion trillion = 1 trillion billion = 1,000,000,000,000,000,000,000
There are 11 zeroes in 700 billion, or 700,000,000,000. If you remember that there are 9 zeroes in 1 billion, then it is simple to figure this out. Likewise, there are 12 zeroes in 1 trillion.
1 trillion = 1000 billion so 0.2 trillion = 200 billion.
one trillion zeros!!