1 billion thousand is not a number.
A "thousand billion" on the US short scale would be a "trillion" with 12 zeroes (1 x 1012).
A thousand billion on the long scale (Europe and Latin America) would be a "billiard" with 15 zeroes (1 x 1015).
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In the U.S., a billion is a thousand million, so Nine zeros.
1 billion has 9 zeros.
One billion is 10x10x10x10x10x10x10x10x10. It is a 1 followed by nine zeros. It is one thousand millions
9 zeros
Ten billion is written as 1 followed by 10 zeros; 10,000,000,000