31121112221124 has 24 divisors (see below), whose sum is σ = 76437819491040. Its totient is φ = 9827719648704.

The previous prime is 31121112221093. The next prime is 31121112221159. The reversal of 31121112221124 is 42112221112113.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 31121112221094 and 31121112221103.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68248052889 + ... + 68248053344.

It is an arithmetic number, because the mean of its divisors is an integer number (3184909145460).

Almost surely, 2^{31121112221124} is an apocalyptic number.

It is an amenable number.

31121112221124 is an abundant number, since it is smaller than the sum of its proper divisors (45316707269916).

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

31121112221124 is a wasteful number, since it uses less digits than its factorization.

31121112221124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136496106259 (or 136496106257 counting only the distinct ones).

The product of its digits is 384, while the sum is 24.

Adding to 31121112221124 its reverse (42112221112113), we get a palindrome (73233333333237).

The spelling of 31121112221124 in words is "thirty-one trillion, one hundred twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, one hundred twenty-four".