321213142401421 has 4 divisors (see below), whose sum is σ = 321216863548672. Its totient is φ = 321209421254172.

The previous prime is 321213142401401. The next prime is 321213142401461. The reversal of 321213142401421 is 124104241312123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 321213142401421 - 2²⁷ = 321213008183693 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 (321213142401401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1860444141 + ... + 1860616786.

It is an arithmetic number, because the mean of its divisors is an integer number (80304215887168).

Almost surely, 2^{321213142401421} is an apocalyptic number.

It is an amenable number.

321213142401421 is a deficient number, since it is larger than the sum of its proper divisors (3721147251).

321213142401421 is an equidigital number, since it uses as much as digits as its factorization.

321213142401421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3721147250.

The product of its (nonzero) digits is 9216, while the sum is 31.

Adding to 321213142401421 its reverse (124104241312123), we get a palindrome (445317383713544).

The spelling of 321213142401421 in words is "three hundred twenty-one trillion, two hundred thirteen billion, one hundred forty-two million, four hundred one thousand, four hundred twenty-one".