uncentillion.
Duocentillion
In the standard naming system for large numbers, a centillion is equal to 10^303. Therefore, the prefix "un-" would indicate a number that is one less than a centillion, which would be 10^303 - 1. However, this naming system is not universally agreed upon, and different systems may have different names for extremely large numbers. In some systems, "uncentillion" may indeed be considered a number, although it is not commonly used in mainstream mathematics.
how many zeros in one billion
Seven zeros.
12 zeros.12 zeros.12 zeros.12 zeros.
33 zeros
there are 21 zeros
Six zeros: 127,000,000
how many zeros in 12 lakh
8 zeros 1,300,000,000
1,000,000,000,000,000,000,000,000,000 = 9 x 3 zeros = 27 zeros