31210112212 has 24 divisors (see below), whose sum is σ = 55206014472. Its totient is φ = 15437232000.

The previous prime is 31210112117. The next prime is 31210112231. The reversal of 31210112212 is 21221101213.

It can be written as a sum of positive squares in 4 ways, for example, as 16231779216 + 14978332996 = 127404^2 + 122386^2 .

It is a super-2 number, since 2×31210112212² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 444418 + ... + 509830.

It is an arithmetic number, because the mean of its divisors is an integer number (2300250603).

Almost surely, 2^31210112212 is an apocalyptic number.

It is an amenable number.

31210112212 is a deficient number, since it is larger than the sum of its proper divisors (23995902260).

31210112212 is a wasteful number, since it uses less digits than its factorization.

31210112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66699 (or 66697 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 31210112212 its reverse (21221101213), we get a palindrome (52431213425).

The spelling of 31210112212 in words is "thirty-one billion, two hundred ten million, one hundred twelve thousand, two hundred twelve".