321212222012 has 48 divisors (see below), whose sum is σ = 627849750528. Its totient is φ = 142538742720.

The previous prime is 321212221997. The next prime is 321212222063. The reversal of 321212222012 is 210222212123.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 625373 + ... + 1016619.

It is an arithmetic number, because the mean of its divisors is an integer number (13080203136).

Almost surely, 2^321212222012 is an apocalyptic number.

It is an amenable number.

321212222012 is a deficient number, since it is larger than the sum of its proper divisors (306637528516).

321212222012 is a wasteful number, since it uses less digits than its factorization.

321212222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391706 (or 391704 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 321212222012 its reverse (210222212123), we get a palindrome (531434434135).

The spelling of 321212222012 in words is "three hundred twenty-one billion, two hundred twelve million, two hundred twenty-two thousand, twelve".