31123303124 has 24 divisors (see below), whose sum is σ = 55369956096. Its totient is φ = 15303420000.

The previous prime is 31123303109. The next prime is 31123303147. The reversal of 31123303124 is 42130332113.

It is a self number, because there is not a number n which added to its sum of digits gives 31123303124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1588709 + ... + 1608179.

It is an arithmetic number, because the mean of its divisors is an integer number (2307081504).

Almost surely, 2^31123303124 is an apocalyptic number.

It is an amenable number.

31123303124 is a deficient number, since it is larger than the sum of its proper divisors (24246652972).

31123303124 is a wasteful number, since it uses less digits than its factorization.

31123303124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26087 (or 26085 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31123303124 its reverse (42130332113), we get a palindrome (73253635237).

The spelling of 31123303124 in words is "thirty-one billion, one hundred twenty-three million, three hundred three thousand, one hundred twenty-four".