22131212525312 has 36 divisors (see below), whose sum is σ = 48191972735256. Its totient is φ = 10059642055680.

The previous prime is 22131212525287. The next prime is 22131212525321. The reversal of 22131212525312 is 21352521213122.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3929544863 + ... + 3929550494.

Almost surely, 2^{22131212525312} is an apocalyptic number.

22131212525312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22131212525312 is an abundant number, since it is smaller than the sum of its proper divisors (26060760209944).

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

22131212525312 is an equidigital number, since it uses as much as digits as its factorization.

22131212525312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7859095384 (or 7859095370 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

Adding to 22131212525312 its reverse (21352521213122), we get a palindrome (43483733738434).

The spelling of 22131212525312 in words is "twenty-two trillion, one hundred thirty-one billion, two hundred twelve million, five hundred twenty-five thousand, three hundred twelve".