321212313212 has 12 divisors (see below), whose sum is σ = 642424626480. Its totient is φ = 137662419936.

The previous prime is 321212313137. The next prime is 321212313217. The reversal of 321212313212 is 212313212123.

321212313212 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321212313217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5735934137 + ... + 5735934192.

It is an arithmetic number, because the mean of its divisors is an integer number (53535385540).

Almost surely, 2^321212313212 is an apocalyptic number.

It is an amenable number.

321212313212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

321212313212 is a wasteful number, since it uses less digits than its factorization.

321212313212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11471868340 (or 11471868338 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

Adding to 321212313212 its reverse (212313212123), we get a palindrome (533525525335).

The spelling of 321212313212 in words is "three hundred twenty-one billion, two hundred twelve million, three hundred thirteen thousand, two hundred twelve".