321430324201321 has 2 divisors, whose sum is σ = 321430324201322. Its totient is φ = 321430324201320.

The previous prime is 321430324201319. The next prime is 321430324201369. The reversal of 321430324201321 is 123102423034123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 287273312841321 + 34157011360000 = 16949139^2 + 5844400^2 .

It is a cyclic number.

It is not a de Polignac number, because 321430324201321 - 2¹ = 321430324201319 is a prime.

Together with 321430324201319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (321430324201121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160715162100660 + 160715162100661.

It is an arithmetic number, because the mean of its divisors is an integer number (160715162100661).

Almost surely, 2^{321430324201321} is an apocalyptic number.

It is an amenable number.

321430324201321 is a deficient number, since it is larger than the sum of its proper divisors (1).

321430324201321 is an equidigital number, since it uses as much as digits as its factorization.

321430324201321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 321430324201321 its reverse (123102423034123), we get a palindrome (444532747235444).

The spelling of 321430324201321 in words is "three hundred twenty-one trillion, four hundred thirty billion, three hundred twenty-four million, two hundred one thousand, three hundred twenty-one".