21131301322413 has 32 divisors (see below), whose sum is σ = 31339492116480. Its totient is φ = 14072301483120.

The previous prime is 21131301322381. The next prime is 21131301322441. The reversal of 21131301322413 is 31422310313112.

21131301322413 is a `hidden beast` number, since 2 + 1 + 1 + 31 + 301 + 322 + 4 + 1 + 3 = 666.

It is not a de Polignac number, because 21131301322413 - 2⁵ = 21131301322381 is a prime.

It is a super-2 number, since 2×21131301322413² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131301322213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 178954570 + ... + 179072612.

It is an arithmetic number, because the mean of its divisors is an integer number (979359128640).

Almost surely, 2^{21131301322413} is an apocalyptic number.

It is an amenable number.

21131301322413 is a deficient number, since it is larger than the sum of its proper divisors (10208190794067).

21131301322413 is a wasteful number, since it uses less digits than its factorization.

21131301322413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125166 (or 125160 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 21131301322413 its reverse (31422310313112), we get a palindrome (52553611635525).

The spelling of 21131301322413 in words is "twenty-one trillion, one hundred thirty-one billion, three hundred one million, three hundred twenty-two thousand, four hundred thirteen".