One quadrillion
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Quadrillion definition1. a cardinal number represented in the U.S. by 1 followed by 15 zeros,and in Great Britain by 1 followed by 24 zeros.
9 zeros
That depends how many zeros follow the 1.
One quadrillion = 1,000,000,000,000,000 = 1 × 1015, thus 15 zeros.
If you meant a number followed by 100 zeros, that would be Google if the number was a 1. If you meant 100 zeros followed by a number, that would be just that number.