321213130000021 has 8 divisors (see below), whose sum is σ = 367109029747520. Its totient is φ = 275319307689408.

The previous prime is 321213130000003. The next prime is 321213130000027. The reversal of 321213130000021 is 120000031312123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 321213130000021 - 2⁵ = 321213129999989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321213130000027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 519027876 + ... + 519646381.

It is an arithmetic number, because the mean of its divisors is an integer number (45888628718440).

Almost surely, 2^{321213130000021} is an apocalyptic number.

It is an amenable number.

321213130000021 is a deficient number, since it is larger than the sum of its proper divisors (45895899747499).

321213130000021 is a wasteful number, since it uses less digits than its factorization.

321213130000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038718443.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 321213130000021 its reverse (120000031312123), we get a palindrome (441213161312144).

The spelling of 321213130000021 in words is "three hundred twenty-one trillion, two hundred thirteen billion, one hundred thirty million, twenty-one", and thus it is an aban number.