Zeptillion

The zeptillion is equal to \(10^{3\times10^{21}+3}\), or \(10^{3\text{ sextillion }3}\). The term was coined by Jonathan Bowers. In his naming system, it is the smallest positive integer with the letter "z" in the name (0 is the only integer whose official English name contains the letter "z"). It is 3,000,000,000,000,000,000,003 digits long.

Written out in decimal form zeptillion (in the short scale) is:

1033

In long scale:

106

Zeptillion is also known as one milliamilliamilliamilliamilliamilliamilliatillion according to Landon Curt Noll's The English name of a number.

Etymology
The name of this number is based on the suffix "-illion" and SI prefix "zepto-".