31020122013 has 16 divisors (see below), whose sum is σ = 42148999296. Its totient is φ = 20285819840.

The previous prime is 31020121997. The next prime is 31020122039. The reversal of 31020122013 is 31022102013.

It is a cyclic number.

It is not a de Polignac number, because 31020122013 - 2⁴ = 31020121997 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31020121983 and 31020122001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020122093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 915256 + ... + 948542.

It is an arithmetic number, because the mean of its divisors is an integer number (2634312456).

Almost surely, 2^31020122013 is an apocalyptic number.

It is an amenable number.

31020122013 is a deficient number, since it is larger than the sum of its proper divisors (11128877283).

31020122013 is a wasteful number, since it uses less digits than its factorization.

31020122013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39204.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31020122013 its reverse (31022102013), we get a palindrome (62042224026).

The spelling of 31020122013 in words is "thirty-one billion, twenty million, one hundred twenty-two thousand, thirteen".