31020113133 has 64 divisors (see below), whose sum is σ = 48981542400. Its totient is φ = 19361548800.

The previous prime is 31020113099. The next prime is 31020113147. The reversal of 31020113133 is 33131102013.

It is a happy number.

It is not a de Polignac number, because 31020113133 - 2²⁴ = 31003335917 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020118133) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5579391 + ... + 5584947.

It is an arithmetic number, because the mean of its divisors is an integer number (765336600).

Almost surely, 2^31020113133 is an apocalyptic number.

It is an amenable number.

31020113133 is a deficient number, since it is larger than the sum of its proper divisors (17961429267).

31020113133 is a wasteful number, since it uses less digits than its factorization.

31020113133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5779 (or 5773 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31020113133 its reverse (33131102013), we get a palindrome (64151215146).

The spelling of 31020113133 in words is "thirty-one billion, twenty million, one hundred thirteen thousand, one hundred thirty-three".