312131111213020 has 96 divisors (see below), whose sum is σ = 719105318882496. Its totient is φ = 112860901324800.

The previous prime is 312131111212993. The next prime is 312131111213027. The reversal of 312131111213020 is 20312111131213.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 312131111212982 and 312131111213000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312131111213027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 317790922 + ... + 318771598.

It is an arithmetic number, because the mean of its divisors is an integer number (7490680405026).

Almost surely, 2^{312131111213020} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 312131111213020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359552659441248).

312131111213020 is an abundant number, since it is smaller than the sum of its proper divisors (406974207669476).

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

312131111213020 is a wasteful number, since it uses less digits than its factorization.

312131111213020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988871 (or 988869 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 312131111213020 its reverse (20312111131213), we get a palindrome (332443222344233).

The spelling of 312131111213020 in words is "three hundred twelve trillion, one hundred thirty-one billion, one hundred eleven million, two hundred thirteen thousand, twenty".