21010320331 has 24 divisors (see below), whose sum is σ = 28423385312. Its totient is φ = 15112310400.

The previous prime is 21010320299. The next prime is 21010320337. The reversal of 21010320331 is 13302301012.

It is not a de Polignac number, because 21010320331 - 2⁵ = 21010320299 is a prime.

It is a super-2 number, since 2×21010320331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21010320337) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 943050 + ... + 965071.

Almost surely, 2^21010320331 is an apocalyptic number.

21010320331 is a deficient number, since it is larger than the sum of its proper divisors (7413064981).

21010320331 is a wasteful number, since it uses less digits than its factorization.

21010320331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908163 (or 1908152 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21010320331 its reverse (13302301012), we get a palindrome (34312621343).

The spelling of 21010320331 in words is "twenty-one billion, ten million, three hundred twenty thousand, three hundred thirty-one".