31020131013 has 16 divisors (see below), whose sum is σ = 43796750400. Its totient is φ = 19462000896.

The previous prime is 31020131011. The next prime is 31020131017. The reversal of 31020131013 is 31013102013.

It is not a de Polignac number, because 31020131013 - 2¹ = 31020131011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31020130983 and 31020131001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020131011) 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, 1012506 + ... + 1042692.

It is an arithmetic number, because the mean of its divisors is an integer number (2737296900).

Almost surely, 2^31020131013 is an apocalyptic number.

It is an amenable number.

31020131013 is a deficient number, since it is larger than the sum of its proper divisors (12776619387).

31020131013 is a wasteful number, since it uses less digits than its factorization.

31020131013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50356.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 31020131013 its reverse (31013102013), we get a palindrome (62033233026).

The spelling of 31020131013 in words is "thirty-one billion, twenty million, one hundred thirty-one thousand, thirteen".