31213312223112 has 64 divisors (see below), whose sum is σ = 88339562928000. Its totient is φ = 10208127264192.

The previous prime is 31213312223011. The next prime is 31213312223131. The reversal of 31213312223112 is 21132221331213.

31213312223112 is a `hidden beast` number, since 3 + 1 + 2 + 13 + 312 + 22 + 311 + 2 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1363253412 + ... + 1363276307.

It is an arithmetic number, because the mean of its divisors is an integer number (1380305670750).

Almost surely, 2^{31213312223112} is an apocalyptic number.

It is an amenable number.

31213312223112 is an abundant number, since it is smaller than the sum of its proper divisors (57126250704888).

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

31213312223112 is a wasteful number, since it uses less digits than its factorization.

31213312223112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2726529787 (or 2726529777 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

Adding to 31213312223112 its reverse (21132221331213), we get a palindrome (52345533554325).

The spelling of 31213312223112 in words is "thirty-one trillion, two hundred thirteen billion, three hundred twelve million, two hundred twenty-three thousand, one hundred twelve".