31223320012212 has 24 divisors (see below), whose sum is σ = 72858138763200. Its totient is φ = 10407241137216.

The previous prime is 31223320012177. The next prime is 31223320012223. The reversal of 31223320012212 is 21221002332213.

It is a congruent number.

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, 66280537 + ... + 66749952.

It is an arithmetic number, because the mean of its divisors is an integer number (3035755781800).

Almost surely, 2^{31223320012212} is an apocalyptic number.

It is an amenable number.

31223320012212 is an abundant number, since it is smaller than the sum of its proper divisors (41634818750988).

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

31223320012212 is a wasteful number, since it uses less digits than its factorization.

31223320012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133050055 (or 133050053 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31223320012212 its reverse (21221002332213), we get a palindrome (52444322344425).

The spelling of 31223320012212 in words is "thirty-one trillion, two hundred twenty-three billion, three hundred twenty million, twelve thousand, two hundred twelve".