31222120133100 has 72 divisors (see below), whose sum is σ = 97284924078160. Its totient is φ = 7685444954880.

The previous prime is 31222120133063. The next prime is 31222120133101. The reversal of 31222120133100 is 133102122213.

It is a super-2 number, since 2×31222120133100² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31222120133101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4002832015 + ... + 4002839814.

Almost surely, 2^{31222120133100} is an apocalyptic number.

31222120133100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31222120133100 is an abundant number, since it is smaller than the sum of its proper divisors (66062803945060).

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

31222120133100 is a wasteful number, since it uses less digits than its factorization.

31222120133100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8005671859 (or 8005671852 counting only the distinct ones).

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

Adding to 31222120133100 its reverse (133102122213), we get a palindrome (31355222255313).

The spelling of 31222120133100 in words is "thirty-one trillion, two hundred twenty-two billion, one hundred twenty million, one hundred thirty-three thousand, one hundred".