22131223131 has 16 divisors (see below), whose sum is σ = 29726566688. Its totient is φ = 14645318400.

The previous prime is 22131223087. The next prime is 22131223159. The reversal of 22131223131 is 13132213122.

It is not a de Polignac number, because 22131223131 - 2¹⁰ = 22131222107 is a prime.

It is a super-2 number, since 2×22131223131² (a number of 21 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 = 22131223098 and 22131223107.

It is not an unprimeable number, because it can be changed into a prime (22131223831) 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, 256095 + ... + 331431.

It is an arithmetic number, because the mean of its divisors is an integer number (1857910418).

Almost surely, 2^22131223131 is an apocalyptic number.

22131223131 is a deficient number, since it is larger than the sum of its proper divisors (7595343557).

22131223131 is a wasteful number, since it uses less digits than its factorization.

22131223131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76062.

The product of its digits is 432, while the sum is 21.

Adding to 22131223131 its reverse (13132213122), we get a palindrome (35263436253).

The spelling of 22131223131 in words is "twenty-two billion, one hundred thirty-one million, two hundred twenty-three thousand, one hundred thirty-one".