31112422020 has 72 divisors (see below), whose sum is σ = 94390558080. Its totient is φ = 8295220800.

The previous prime is 31112421997. The next prime is 31112422037. The reversal of 31112422020 is 2022421113.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31112421984 and 31112422002.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1420311 + ... + 1442049.

Almost surely, 2^31112422020 is an apocalyptic number.

31112422020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31112422020 is an abundant number, since it is smaller than the sum of its proper divisors (63278136060).

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

31112422020 is a wasteful number, since it uses less digits than its factorization.

31112422020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29705 (or 29700 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 31112422020 its reverse (2022421113), we get a palindrome (33134843133).

The spelling of 31112422020 in words is "thirty-one billion, one hundred twelve million, four hundred twenty-two thousand, twenty".