31312124013 has 16 divisors (see below), whose sum is σ = 44066616320. Its totient is φ = 19722179376.

The previous prime is 31312124009. The next prime is 31312124023. The reversal of 31312124013 is 31042121313.

It is not a de Polignac number, because 31312124013 - 2² = 31312124009 is a prime.

It is a super-2 number, since 2×31312124013² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312124023) by changing a digit.

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, 727495 + ... + 769332.

It is an arithmetic number, because the mean of its divisors is an integer number (2754163520).

Almost surely, 2^31312124013 is an apocalyptic number.

It is an amenable number.

31312124013 is a deficient number, since it is larger than the sum of its proper divisors (12754492307).

31312124013 is a wasteful number, since it uses less digits than its factorization.

31312124013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497216.

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

Adding to 31312124013 its reverse (31042121313), we get a palindrome (62354245326).

The spelling of 31312124013 in words is "thirty-one billion, three hundred twelve million, one hundred twenty-four thousand, thirteen".