221300012131 has 32 divisors (see below), whose sum is σ = 248458129920. Its totient is φ = 195396364800.

The previous prime is 221300012123. The next prime is 221300012149. The reversal of 221300012131 is 131210003122.

It is a cyclic number.

It is not a de Polignac number, because 221300012131 - 2³ = 221300012123 is a prime.

It is a super-2 number, since 2×221300012131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221300012231) 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, 71872450 + ... + 71875528.

It is an arithmetic number, because the mean of its divisors is an integer number (7764316560).

Almost surely, 2^221300012131 is an apocalyptic number.

221300012131 is a deficient number, since it is larger than the sum of its proper divisors (27158117789).

221300012131 is a wasteful number, since it uses less digits than its factorization.

221300012131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4347.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 221300012131 its reverse (131210003122), we get a palindrome (352510015253).

Subtracting from 221300012131 its reverse (131210003122), we obtain a palindrome (90090009009).

The spelling of 221300012131 in words is "two hundred twenty-one billion, three hundred million, twelve thousand, one hundred thirty-one".