121239200810 has 128 divisors (see below), whose sum is σ = 273275251200. Its totient is φ = 37705015296.

The previous prime is 121239200807. The next prime is 121239200821. The reversal of 121239200810 is 18002932121.

It is a super-2 number, since 2×121239200810² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18796466 + ... + 18802914.

It is an arithmetic number, because the mean of its divisors is an integer number (2134962900).

Almost surely, 2^121239200810 is an apocalyptic number.

121239200810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121239200810 is an abundant number, since it is smaller than the sum of its proper divisors (152036050390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121239200810 is a wasteful number, since it uses less digits than its factorization.

121239200810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6832.

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 121239200810 in words is "one hundred twenty-one billion, two hundred thirty-nine million, two hundred thousand, eight hundred ten".