321420300401021 has 8 divisors (see below), whose sum is σ = 322118306022744. Its totient is φ = 320722298163520.

The previous prime is 321420300400963. The next prime is 321420300401059. The reversal of 321420300401021 is 120104003024123.

It can be written as a sum of positive squares in 4 ways, for example, as 29725121805625 + 291695178595396 = 5452075^2 + 17079086^2 .

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 321420300401021 - 2²⁶ = 321420233292157 is a prime.

It is a super-2 number, since 2×321420300401021² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321420300401521) 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, 327249755 + ... + 328230471.

It is an arithmetic number, because the mean of its divisors is an integer number (40264788252843).

Almost surely, 2^{321420300401021} is an apocalyptic number.

It is an amenable number.

321420300401021 is a deficient number, since it is larger than the sum of its proper divisors (698005621723).

321420300401021 is an equidigital number, since it uses as much as digits as its factorization.

321420300401021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692111.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 321420300401021 its reverse (120104003024123), we get a palindrome (441524303425144).

The spelling of 321420300401021 in words is "three hundred twenty-one trillion, four hundred twenty billion, three hundred million, four hundred one thousand, twenty-one".