31131012323112 has 64 divisors (see below), whose sum is σ = 84875204064000. Its totient is φ = 9457522723584.

The previous prime is 31131012323071. The next prime is 31131012323113. The reversal of 31131012323112 is 21132321013113.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (31131012323113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 631487287 + ... + 631536582.

It is an arithmetic number, because the mean of its divisors is an integer number (1326175063500).

Almost surely, 2^{31131012323112} is an apocalyptic number.

It is an amenable number.

31131012323112 is an abundant number, since it is smaller than the sum of its proper divisors (53744191740888).

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

31131012323112 is a wasteful number, since it uses less digits than its factorization.

31131012323112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263023970 (or 1263023966 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 31131012323112 its reverse (21132321013113), we get a palindrome (52263333336225).

The spelling of 31131012323112 in words is "thirty-one trillion, one hundred thirty-one billion, twelve million, three hundred twenty-three thousand, one hundred twelve".