31312103124 has 48 divisors (see below), whose sum is σ = 76253208192. Its totient is φ = 9981599232.

The previous prime is 31312103117. The next prime is 31312103143. The reversal of 31312103124 is 42130121313.

It is a self number, because there is not a number n which added to its sum of digits gives 31312103124.

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 15 ways as a sum of consecutive naturals, for example, 2132512 + ... + 2147144.

It is an arithmetic number, because the mean of its divisors is an integer number (1588608504).

Almost surely, 2^31312103124 is an apocalyptic number.

It is an amenable number.

31312103124 is an abundant number, since it is smaller than the sum of its proper divisors (44941105068).

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

31312103124 is a wasteful number, since it uses less digits than its factorization.

31312103124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22416 (or 22414 counting only the distinct ones).

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

Adding to 31312103124 its reverse (42130121313), we get a palindrome (73442224437).

The spelling of 31312103124 in words is "thirty-one billion, three hundred twelve million, one hundred three thousand, one hundred twenty-four".