21010331013 has 16 divisors (see below), whose sum is σ = 32159318016. Its totient is φ = 11952062640.

The previous prime is 21010331009. The next prime is 21010331021. The reversal of 21010331013 is 31013301012.

It is not a de Polignac number, because 21010331013 - 2² = 21010331009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21010330983 and 21010331001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010331053) 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, 2238573 + ... + 2247938.

It is an arithmetic number, because the mean of its divisors is an integer number (2009957376).

Almost surely, 2^21010331013 is an apocalyptic number.

It is an amenable number.

21010331013 is a deficient number, since it is larger than the sum of its proper divisors (11148987003).

21010331013 is a wasteful number, since it uses less digits than its factorization.

21010331013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4486744.

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

Adding to 21010331013 its reverse (31013301012), we get a palindrome (52023632025).

The spelling of 21010331013 in words is "twenty-one billion, ten million, three hundred thirty-one thousand, thirteen".