321420021320401 has 4 divisors (see below), whose sum is σ = 322861366707712. Its totient is φ = 319978675933092.

The previous prime is 321420021320389. The next prime is 321420021320477. The reversal of 321420021320401 is 104023120024123.

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 321420021320401 - 2⁵ = 321420021320369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321420021326401) 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, 720672693321 + ... + 720672693766.

It is an arithmetic number, because the mean of its divisors is an integer number (80715341676928).

Almost surely, 2^{321420021320401} is an apocalyptic number.

It is an amenable number.

321420021320401 is a deficient number, since it is larger than the sum of its proper divisors (1441345387311).

321420021320401 is a wasteful number, since it uses less digits than its factorization.

321420021320401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441345387310.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 321420021320401 its reverse (104023120024123), we get a palindrome (425443141344524).

The spelling of 321420021320401 in words is "three hundred twenty-one trillion, four hundred twenty billion, twenty-one million, three hundred twenty thousand, four hundred one".