31122002120 has 32 divisors (see below), whose sum is σ = 76390369920. Its totient is φ = 11317091520.

The previous prime is 31122002089. The next prime is 31122002231. The reversal of 31122002120 is 2120022113.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31122002095 and 31122002104.

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, 35365472 + ... + 35366351.

It is an arithmetic number, because the mean of its divisors is an integer number (2387199060).

Almost surely, 2^31122002120 is an apocalyptic number.

It is an amenable number.

31122002120 is an abundant number, since it is smaller than the sum of its proper divisors (45268367800).

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

31122002120 is a wasteful number, since it uses less digits than its factorization.

31122002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70731845 (or 70731841 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 31122002120 its reverse (2120022113), we get a palindrome (33242024233).

The spelling of 31122002120 in words is "thirty-one billion, one hundred twenty-two million, two thousand, one hundred twenty".