121031312031210 has 64 divisors (see below), whose sum is σ = 332928289400832. Its totient is φ = 27584575669056.

The previous prime is 121031312031169. The next prime is 121031312031247. The reversal of 121031312031210 is 12130213130121.

It is a super-2 number, since 2×121031312031210² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 830387622 + ... + 830533361.

It is an arithmetic number, because the mean of its divisors is an integer number (5202004521888).

Almost surely, 2^{121031312031210} is an apocalyptic number.

121031312031210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121031312031210 is an abundant number, since it is smaller than the sum of its proper divisors (211896977369622).

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

121031312031210 is a wasteful number, since it uses less digits than its factorization.

121031312031210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660921347.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 121031312031210 its reverse (12130213130121), we get a palindrome (133161525161331).

The spelling of 121031312031210 in words is "one hundred twenty-one trillion, thirty-one billion, three hundred twelve million, thirty-one thousand, two hundred ten".