31311123312113 has 8 divisors (see below), whose sum is σ = 31322173331232. Its totient is φ = 31300074854496.

The previous prime is 31311123312043. The next prime is 31311123312281. The reversal of 31311123312113 is 31121332111313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31311123312113 - 2⁸ = 31311123311857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31311123314113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40472306 + ... + 41238692.

It is an arithmetic number, because the mean of its divisors is an integer number (3915271666404).

Almost surely, 2^{31311123312113} is an apocalyptic number.

It is an amenable number.

31311123312113 is a deficient number, since it is larger than the sum of its proper divisors (11050019119).

31311123312113 is a wasteful number, since it uses less digits than its factorization.

31311123312113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780751.

The product of its digits is 972, while the sum is 26.

Adding to 31311123312113 its reverse (31121332111313), we get a palindrome (62432455423426).

The spelling of 31311123312113 in words is "thirty-one trillion, three hundred eleven billion, one hundred twenty-three million, three hundred twelve thousand, one hundred thirteen".