31112021112 has 32 divisors (see below), whose sum is σ = 79434950400. Its totient is φ = 10150020704.

The previous prime is 31112021093. The next prime is 31112021131. The reversal of 31112021112 is 21112021113.

It is an interprime number because it is at equal distance from previous prime (31112021093) and next prime (31112021131).

It is a junction number, because it is equal to n+sod(n) for n = 31112021091 and 31112021100.

It is a congruent number.

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, 13789662 + ... + 13791917.

It is an arithmetic number, because the mean of its divisors is an integer number (2482342200).

Almost surely, 2^31112021112 is an apocalyptic number.

It is an amenable number.

31112021112 is an abundant number, since it is smaller than the sum of its proper divisors (48322929288).

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

31112021112 is a wasteful number, since it uses less digits than its factorization.

31112021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27581635 (or 27581631 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 31112021112 its reverse (21112021113), we get a palindrome (52224042225).

Subtracting from 31112021112 its reverse (21112021113), we obtain a palindrome (9999999999).

The spelling of 31112021112 in words is "thirty-one billion, one hundred twelve million, twenty-one thousand, one hundred twelve".