21227110331 has 16 divisors (see below), whose sum is σ = 24361747200. Its totient is φ = 18118111968.

The previous prime is 21227110291. The next prime is 21227110337. The reversal of 21227110331 is 13301172212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21227110331 is a prime.

It is a super-2 number, since 2×21227110331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21227110297 and 21227110306.

It is not an unprimeable number, because it can be changed into a prime (21227110337) 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, 4096100 + ... + 4101278.

It is an arithmetic number, because the mean of its divisors is an integer number (1522609200).

Almost surely, 2^21227110331 is an apocalyptic number.

21227110331 is a deficient number, since it is larger than the sum of its proper divisors (3134636869).

21227110331 is a wasteful number, since it uses less digits than its factorization.

21227110331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7538.

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 21227110331 its reverse (13301172212), we get a palindrome (34528282543).

The spelling of 21227110331 in words is "twenty-one billion, two hundred twenty-seven million, one hundred ten thousand, three hundred thirty-one".