13013131021 has 4 divisors (see below), whose sum is σ = 14196142944. Its totient is φ = 11830119100.

The previous prime is 13013131009. The next prime is 13013131039. The reversal of 13013131021 is 12013131031.

13013131021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13013131021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13013130986 and 13013131004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13013131421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591505945 + ... + 591505966.

It is an arithmetic number, because the mean of its divisors is an integer number (3549035736).

Almost surely, 2^13013131021 is an apocalyptic number.

13013131021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13013131021 is a deficient number, since it is larger than the sum of its proper divisors (1183011923).

13013131021 is a wasteful number, since it uses less digits than its factorization.

13013131021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183011922.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 13013131021 its reverse (12013131031), we get a palindrome (25026262052).

The spelling of 13013131021 in words is "thirteen billion, thirteen million, one hundred thirty-one thousand, twenty-one".