21313204051131 has 12 divisors (see below), whose sum is σ = 30785780544480. Its totient is φ = 14208783611760.

The previous prime is 21313204051067. The next prime is 21313204051133. The reversal of 21313204051131 is 13115040231312.

21313204051131 is a `hidden beast` number, since 2 + 13 + 132 + 0 + 4 + 0 + 511 + 3 + 1 = 666.

It is not a de Polignac number, because 21313204051131 - 2⁶ = 21313204051067 is a prime.

It is a super-2 number, since 2×21313204051131² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21313204051095 and 21313204051104.

It is not an unprimeable number, because it can be changed into a prime (21313204051133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9693550 + ... + 11687228.

It is an arithmetic number, because the mean of its divisors is an integer number (2565481712040).

Almost surely, 2^{21313204051131} is an apocalyptic number.

21313204051131 is a deficient number, since it is larger than the sum of its proper divisors (9472576493349).

21313204051131 is a wasteful number, since it uses less digits than its factorization.

21313204051131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3181506 (or 3181503 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

Adding to 21313204051131 its reverse (13115040231312), we get a palindrome (34428244282443).

The spelling of 21313204051131 in words is "twenty-one trillion, three hundred thirteen billion, two hundred four million, fifty-one thousand, one hundred thirty-one".