How many zeros must be placed after the number 1 in order to form the number octillion?

Answer 1

The number of zeros behind the one in the number octillion is five zeros

CorrectionIn American usage, the prefix of an "-illion" number represents the number of groups of three zeros following the "1,000" part of the number. That means an octillion would have 8 groups of 3 zeros after the 1,000 for a total of 27 zeros.

1 million = 1,000,000 ('mi' is related to 'mono', or 'one')

1 billion = 1,000,000,000 ('bi' ='two')

1 trillion = 1,000,000,000,000 ('tri' ='three')

1 quadrillion = 1,000,000,000,000,000('quad' = 'four')

1 quintillion = 1,000,000,000,000,000,000('quint' = 'five')

and so on