31221022122 has 48 divisors (see below), whose sum is σ = 68377271040. Its totient is φ = 10295041536.

The previous prime is 31221022109. The next prime is 31221022127. The reversal of 31221022122 is 22122012213.

31221022122 is a `hidden beast` number, since 312 + 210 + 22 + 122 = 666.

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 = 31221022095 and 31221022104.

It is not an unprimeable number, because it can be changed into a prime (31221022127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 596743 + ... + 646949.

It is an arithmetic number, because the mean of its divisors is an integer number (1424526480).

Almost surely, 2^31221022122 is an apocalyptic number.

31221022122 is an abundant number, since it is smaller than the sum of its proper divisors (37156248918).

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

31221022122 is a wasteful number, since it uses less digits than its factorization.

31221022122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50587 (or 50584 counting only the distinct ones).

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

Adding to 31221022122 its reverse (22122012213), we get a palindrome (53343034335).

Subtracting from 31221022122 its reverse (22122012213), we obtain a palindrome (9099009909).

The spelling of 31221022122 in words is "thirty-one billion, two hundred twenty-one million, twenty-two thousand, one hundred twenty-two".