31122332112 has 20 divisors (see below), whose sum is σ = 80399358080. Its totient is φ = 10374110688.

The previous prime is 31122332099. The next prime is 31122332149. The reversal of 31122332112 is 21123322113.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324190912 + ... + 324191007.

It is an arithmetic number, because the mean of its divisors is an integer number (4019967904).

Almost surely, 2^31122332112 is an apocalyptic number.

It is an amenable number.

31122332112 is an abundant number, since it is smaller than the sum of its proper divisors (49277025968).

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

31122332112 is a wasteful number, since it uses less digits than its factorization.

31122332112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648381930 (or 648381924 counting only the distinct ones).

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

Adding to 31122332112 its reverse (21123322113), we get a palindrome (52245654225).

Subtracting from 31122332112 its reverse (21123322113), we obtain a palindrome (9999009999).

The spelling of 31122332112 in words is "thirty-one billion, one hundred twenty-two million, three hundred thirty-two thousand, one hundred twelve".