22131311312 has 20 divisors (see below), whose sum is σ = 46777544736. Its totient is φ = 10059686880.

The previous prime is 22131311309. The next prime is 22131311317. The reversal of 22131311312 is 21311313122.

It is a happy number.

It is a super-2 number, since 2×22131311312² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22131311317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62872868 + ... + 62873219.

Almost surely, 2^22131311312 is an apocalyptic number.

22131311312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22131311312 is an abundant number, since it is smaller than the sum of its proper divisors (24646233424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22131311312 is a wasteful number, since it uses less digits than its factorization.

22131311312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125746106 (or 125746100 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

Adding to 22131311312 its reverse (21311313122), we get a palindrome (43442624434).

The spelling of 22131311312 in words is "twenty-two billion, one hundred thirty-one million, three hundred eleven thousand, three hundred twelve".