22121320131 has 8 divisors (see below), whose sum is σ = 32772326160. Its totient is φ = 14747546736.

The previous prime is 22121320103. The next prime is 22121320139. The reversal of 22121320131 is 13102312122.

22121320131 is a `hidden beast` number, since 2 + 212 + 1 + 320 + 131 = 666.

It is not a de Polignac number, because 22121320131 - 2⁵ = 22121320099 is a prime.

It is a super-2 number, since 2×22121320131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22121320139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409654050 + ... + 409654103.

It is an arithmetic number, because the mean of its divisors is an integer number (4096540770).

Almost surely, 2^22121320131 is an apocalyptic number.

22121320131 is a deficient number, since it is larger than the sum of its proper divisors (10651006029).

22121320131 is an equidigital number, since it uses as much as digits as its factorization.

22121320131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819308162 (or 819308156 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 22121320131 its reverse (13102312122), we get a palindrome (35223632253).

The spelling of 22121320131 in words is "twenty-two billion, one hundred twenty-one million, three hundred twenty thousand, one hundred thirty-one".