321401212 has 24 divisors (see below), whose sum is σ = 615323520. Its totient is φ = 145677360.

The previous prime is 321401209. The next prime is 321401251. The reversal of 321401212 is 212104123.

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, 5623 + ... + 25969.

It is an arithmetic number, because the mean of its divisors is an integer number (25638480).

Almost surely, 2^321401212 is an apocalyptic number.

It is an amenable number.

321401212 is a deficient number, since it is larger than the sum of its proper divisors (293922308).

321401212 is a wasteful number, since it uses less digits than its factorization.

321401212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20721 (or 20719 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 321401212 is about 17927.6661057707. Note that the first 3 decimals coincide. The cubic root of 321401212 is about 684.9872745252.

Adding to 321401212 its reverse (212104123), we get a palindrome (533505335).

The spelling of 321401212 in words is "three hundred twenty-one million, four hundred one thousand, two hundred twelve".