323213000021 has 16 divisors (see below), whose sum is σ = 343098923904. Its totient is φ = 303424617984.

The previous prime is 323213000003. The next prime is 323213000063. The reversal of 323213000021 is 120000312323.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-323213000021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323213003021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28141346 + ... + 28152828.

It is an arithmetic number, because the mean of its divisors is an integer number (21443682744).

Almost surely, 2^323213000021 is an apocalyptic number.

It is an amenable number.

323213000021 is a deficient number, since it is larger than the sum of its proper divisors (19885923883).

323213000021 is a wasteful number, since it uses less digits than its factorization.

323213000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15580.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 323213000021 its reverse (120000312323), we get a palindrome (443213312344).

The spelling of 323213000021 in words is "three hundred twenty-three billion, two hundred thirteen million, twenty-one", and thus it is an aban number.