22012122131 has 4 divisors (see below), whose sum is σ = 22524031992. Its totient is φ = 21500212272.

The previous prime is 22012122113. The next prime is 22012122157. The reversal of 22012122131 is 13122121022.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22012122131 is a prime.

It is a super-2 number, since 2×22012122131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22012122161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255954866 + ... + 255954951.

It is an arithmetic number, because the mean of its divisors is an integer number (5631007998).

Almost surely, 2^22012122131 is an apocalyptic number.

22012122131 is a deficient number, since it is larger than the sum of its proper divisors (511909861).

22012122131 is an equidigital number, since it uses as much as digits as its factorization.

22012122131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511909860.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 22012122131 its reverse (13122121022), we get a palindrome (35134243153).

The spelling of 22012122131 in words is "twenty-two billion, twelve million, one hundred twenty-two thousand, one hundred thirty-one".