321213141200021 has 8 divisors (see below), whose sum is σ = 383061634226304. Its totient is φ = 263354873530320.

The previous prime is 321213141199999. The next prime is 321213141200167. The reversal of 321213141200021 is 120002141312123.

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 321213141200021 - 2¹⁸ = 321213140937877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 321213141200021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321213141200521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 997556338970 + ... + 997556339291.

It is an arithmetic number, because the mean of its divisors is an integer number (47882704278288).

Almost surely, 2^{321213141200021} is an apocalyptic number.

It is an amenable number.

321213141200021 is a deficient number, since it is larger than the sum of its proper divisors (61848493026283).

321213141200021 is a wasteful number, since it uses less digits than its factorization.

321213141200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995112678291.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 321213141200021 its reverse (120002141312123), we get a palindrome (441215282512144).

The spelling of 321213141200021 in words is "three hundred twenty-one trillion, two hundred thirteen billion, one hundred forty-one million, two hundred thousand, twenty-one".