321213212 has 6 divisors (see below), whose sum is σ = 562123128. Its totient is φ = 160606604.

The previous prime is 321213203. The next prime is 321213223. The reversal of 321213212 is 212312123.

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 as a sum of consecutive naturals, namely, 40151648 + ... + 40151655.

It is an arithmetic number, because the mean of its divisors is an integer number (93687188).

Almost surely, 2^321213212 is an apocalyptic number.

It is an amenable number.

321213212 is a deficient number, since it is larger than the sum of its proper divisors (240909916).

321213212 is a wasteful number, since it uses less digits than its factorization.

321213212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80303307 (or 80303305 counting only the distinct ones).

The product of its digits is 144, while the sum is 17.

The square root of 321213212 is about 17922.4220461410. The cubic root of 321213212 is about 684.8536899586.

Adding to 321213212 its reverse (212312123), we get a palindrome (533525335).

The spelling of 321213212 in words is "three hundred twenty-one million, two hundred thirteen thousand, two hundred twelve".