21130312222231 has 16 divisors (see below), whose sum is σ = 21965202806400. Its totient is φ = 20302529032800.

The previous prime is 21130312222207. The next prime is 21130312222237. The reversal of 21130312222231 is 13222221303112.

It is a cyclic number.

It is not a de Polignac number, because 21130312222231 - 2⁵ = 21130312222199 is a prime.

It is a super-2 number, since 2×21130312222231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21130312222196 and 21130312222205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130312222237) 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, 51310776 + ... + 51720946.

It is an arithmetic number, because the mean of its divisors is an integer number (1372825175400).

Almost surely, 2^{21130312222231} is an apocalyptic number.

21130312222231 is a deficient number, since it is larger than the sum of its proper divisors (834890584169).

21130312222231 is a wasteful number, since it uses less digits than its factorization.

21130312222231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418830.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21130312222231 its reverse (13222221303112), we get a palindrome (34352533525343).

The spelling of 21130312222231 in words is "twenty-one trillion, one hundred thirty billion, three hundred twelve million, two hundred twenty-two thousand, two hundred thirty-one".