21310010331 has 8 divisors (see below), whose sum is σ = 28421859840. Its totient is φ = 14202417192.

The previous prime is 21310010317. The next prime is 21310010333. The reversal of 21310010331 is 13301001312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21310010331 - 2⁵ = 21310010299 is a prime.

It is a super-2 number, since 2×21310010331² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21310010331.

It is not an unprimeable number, because it can be changed into a prime (21310010333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1052391 + ... + 1072448.

It is an arithmetic number, because the mean of its divisors is an integer number (3552732480).

Almost surely, 2^21310010331 is an apocalyptic number.

21310010331 is a deficient number, since it is larger than the sum of its proper divisors (7111849509).

21310010331 is a wasteful number, since it uses less digits than its factorization.

21310010331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128185.

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

Adding to 21310010331 its reverse (13301001312), we get a palindrome (34611011643).

The spelling of 21310010331 in words is "twenty-one billion, three hundred ten million, ten thousand, three hundred thirty-one".