31311123312112 has 40 divisors (see below), whose sum is σ = 69332844351456. Its totient is φ = 13418845499136.

The previous prime is 31311123312043. The next prime is 31311123312281. The reversal of 31311123312112 is 21121332111313.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5233278 + ... + 9487330.

Almost surely, 2^{31311123312112} is an apocalyptic number.

It is an amenable number.

31311123312112 is an abundant number, since it is smaller than the sum of its proper divisors (38021721039344).

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

31311123312112 is a wasteful number, since it uses less digits than its factorization.

31311123312112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4319785 (or 4319779 counting only the distinct ones).

The product of its digits is 648, while the sum is 25.

Adding to 31311123312112 its reverse (21121332111313), we get a palindrome (52432455423425).

The spelling of 31311123312112 in words is "thirty-one trillion, three hundred eleven billion, one hundred twenty-three million, three hundred twelve thousand, one hundred twelve".