31210022212 has 48 divisors (see below), whose sum is σ = 58393762560. Its totient is φ = 14553135648.

The previous prime is 31210022189. The next prime is 31210022219. The reversal of 31210022212 is 21222001213.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31210022219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1776423 + ... + 1793905.

It is an arithmetic number, because the mean of its divisors is an integer number (1216536720).

Almost surely, 2^31210022212 is an apocalyptic number.

It is an amenable number.

31210022212 is a deficient number, since it is larger than the sum of its proper divisors (27183740348).

31210022212 is a wasteful number, since it uses less digits than its factorization.

31210022212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17872 (or 17870 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 31210022212 its reverse (21222001213), we get a palindrome (52432023425).

The spelling of 31210022212 in words is "thirty-one billion, two hundred ten million, twenty-two thousand, two hundred twelve".