31122020112 has 40 divisors (see below), whose sum is σ = 80718896160. Its totient is φ = 10332672000.

The previous prime is 31122020099. The next prime is 31122020129. The reversal of 31122020112 is 21102022113.

It is a junction number, because it is equal to n+sod(n) for n = 31122020091 and 31122020100.

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, 1279537 + ... + 1303632.

It is an arithmetic number, because the mean of its divisors is an integer number (2017972404).

Almost surely, 2^31122020112 is an apocalyptic number.

It is an amenable number.

31122020112 is an abundant number, since it is smaller than the sum of its proper divisors (49596876048).

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

31122020112 is a wasteful number, since it uses less digits than its factorization.

31122020112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2583431 (or 2583425 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 31122020112 its reverse (21102022113), we get a palindrome (52224042225).

The spelling of 31122020112 in words is "thirty-one billion, one hundred twenty-two million, twenty thousand, one hundred twelve".