31123013320313 has 16 divisors (see below), whose sum is σ = 32734882653696. Its totient is φ = 29549197941120.

The previous prime is 31123013320283. The next prime is 31123013320337. The reversal of 31123013320313 is 31302331032113.

It is a cyclic number.

It is not a de Polignac number, because 31123013320313 - 2²² = 31123009126009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31123013320363) 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, 31174106 + ... + 32156972.

It is an arithmetic number, because the mean of its divisors is an integer number (2045930165856).

Almost surely, 2^{31123013320313} is an apocalyptic number.

It is an amenable number.

31123013320313 is a deficient number, since it is larger than the sum of its proper divisors (1611869333383).

31123013320313 is a wasteful number, since it uses less digits than its factorization.

31123013320313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002224.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 31123013320313 its reverse (31302331032113), we get a palindrome (62425344352426).

The spelling of 31123013320313 in words is "thirty-one trillion, one hundred twenty-three billion, thirteen million, three hundred twenty thousand, three hundred thirteen".