312021111122 has 24 divisors (see below), whose sum is σ = 551336722560. Its totient is φ = 132030629640.

The previous prime is 312021111113. The next prime is 312021111137. The reversal of 312021111122 is 221111120213.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 312021111122.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20143454 + ... + 20158937.

It is an arithmetic number, because the mean of its divisors is an integer number (22972363440).

Almost surely, 2^312021111122 is an apocalyptic number.

312021111122 is a deficient number, since it is larger than the sum of its proper divisors (239315611438).

312021111122 is a wasteful number, since it uses less digits than its factorization.

312021111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40302486 (or 40302479 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 312021111122 its reverse (221111120213), we get a palindrome (533132231335).

Subtracting from 312021111122 its reverse (221111120213), we obtain a palindrome (90909990909).

The spelling of 312021111122 in words is "three hundred twelve billion, twenty-one million, one hundred eleven thousand, one hundred twenty-two".