31211023312313 has 16 divisors (see below), whose sum is σ = 34696568664576. Its totient is φ = 27880458491520.

The previous prime is 31211023312297. The next prime is 31211023312319. The reversal of 31211023312313 is 31321332011213.

It is a cyclic number.

It is not a de Polignac number, because 31211023312313 - 2⁴ = 31211023312297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31211023312319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34061981 + ... + 34966277.

It is an arithmetic number, because the mean of its divisors is an integer number (2168535541536).

Almost surely, 2^{31211023312313} is an apocalyptic number.

It is an amenable number.

31211023312313 is a deficient number, since it is larger than the sum of its proper divisors (3485545352263).

31211023312313 is a wasteful number, since it uses less digits than its factorization.

31211023312313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989984.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 31211023312313 its reverse (31321332011213), we get a palindrome (62532355323526).

The spelling of 31211023312313 in words is "thirty-one trillion, two hundred eleven billion, twenty-three million, three hundred twelve thousand, three hundred thirteen".