I suspect the question isn't what you wanted to ask: but as it stands, 1 billion equals 1 billion. However, in the English long scale, 1 billion is equivalent to 1 trillion in the American short...
In the US and for most uses in the UK, the number of zeros is 18 (eighteen). 1,000,000,000 x 1,000,000,000 = 1,000,000,000,000,000,000 The name for a "billion billion" is a quintillion, 1 x 1018....
In the US:1 billion = 109 1 billion billion = 1018 That's '1' followed by 18 zeros, for a grand total of 19 digits.But in the UK:1 billion = 10121 billion billion = 1024That's '1' followed by 24...