22100131231 has 4 divisors (see below), whose sum is σ = 22639158864. Its totient is φ = 21561103600.

The previous prime is 22100131211. The next prime is 22100131241. The reversal of 22100131231 is 13213100122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22100131231 - 2⁵ = 22100131199 is a prime.

It is a super-2 number, since 2×22100131231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22100131211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269513755 + ... + 269513836.

It is an arithmetic number, because the mean of its divisors is an integer number (5659789716).

Almost surely, 2^22100131231 is an apocalyptic number.

22100131231 is a deficient number, since it is larger than the sum of its proper divisors (539027633).

22100131231 is an equidigital number, since it uses as much as digits as its factorization.

22100131231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539027632.

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

Adding to 22100131231 its reverse (13213100122), we get a palindrome (35313231353).

The spelling of 22100131231 in words is "twenty-two billion, one hundred million, one hundred thirty-one thousand, two hundred thirty-one".