312131032122 has 64 divisors (see below), whose sum is σ = 773216527104. Its totient is φ = 81795916800.

The previous prime is 312131032019. The next prime is 312131032141. The reversal of 312131032122 is 221230131213.

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, 1734879 + ... + 1906322.

It is an arithmetic number, because the mean of its divisors is an integer number (12081508236).

Almost surely, 2^312131032122 is an apocalyptic number.

312131032122 is an abundant number, since it is smaller than the sum of its proper divisors (461085494982).

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

312131032122 is a wasteful number, since it uses less digits than its factorization.

312131032122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3641383.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 312131032122 its reverse (221230131213), we get a palindrome (533361163335).

Subtracting from 312131032122 its reverse (221230131213), we obtain a palindrome (90900900909).

The spelling of 312131032122 in words is "three hundred twelve billion, one hundred thirty-one million, thirty-two thousand, one hundred twenty-two".