21310300323131 has 16 divisors (see below), whose sum is σ = 22983792437760. Its totient is φ = 19694796308640.

The previous prime is 21310300323121. The next prime is 21310300323167. The reversal of 21310300323131 is 13132300301312.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21310300323131 is a prime.

It is a super-2 number, since 2×21310300323131² (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 = 21310300323097 and 21310300323106.

It is not an unprimeable number, because it can be changed into a prime (21310300323121) 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, 38591840 + ... + 39140141.

It is an arithmetic number, because the mean of its divisors is an integer number (1436487027360).

Almost surely, 2^{21310300323131} is an apocalyptic number.

21310300323131 is a deficient number, since it is larger than the sum of its proper divisors (1673492114629).

21310300323131 is a wasteful number, since it uses less digits than its factorization.

21310300323131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77732354.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 21310300323131 its reverse (13132300301312), we get a palindrome (34442600624443).

The spelling of 21310300323131 in words is "twenty-one trillion, three hundred ten billion, three hundred million, three hundred twenty-three thousand, one hundred thirty-one".