312131232114021 has 16 divisors (see below), whose sum is σ = 462418048396800. Its totient is φ = 208086854373504.

The previous prime is 312131232113977. The next prime is 312131232114029. The reversal of 312131232114021 is 120411232131213.

312131232114021 is a `hidden beast` number, since 3 + 1 + 2 + 1 + 312 + 321 + 1 + 4 + 0 + 21 = 666.

It is not a de Polignac number, because 312131232114021 - 2⁷ = 312131232113893 is a prime.

It is a super-2 number, since 2×312131232114021² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312131232114029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8486901 + ... + 26387306.

It is an arithmetic number, because the mean of its divisors is an integer number (28901128024800).

Almost surely, 2^{312131232114021} is an apocalyptic number.

It is an amenable number.

312131232114021 is a deficient number, since it is larger than the sum of its proper divisors (150286816282779).

312131232114021 is a wasteful number, since it uses less digits than its factorization.

312131232114021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35205705 (or 35205699 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

Adding to 312131232114021 its reverse (120411232131213), we get a palindrome (432542464245234).

The spelling of 312131232114021 in words is "three hundred twelve trillion, one hundred thirty-one billion, two hundred thirty-two million, one hundred fourteen thousand, twenty-one".