321430324201309 has 2 divisors, whose sum is σ = 321430324201310. Its totient is φ = 321430324201308.

The previous prime is 321430324201307. The next prime is 321430324201319. The reversal of 321430324201309 is 903102423034123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 318342495044025 + 3087829157284 = 17842155^2 + 1757222^2 .

It is a cyclic number.

It is not a de Polignac number, because 321430324201309 - 2¹ = 321430324201307 is a prime.

It is a super-2 number, since 2×321430324201309² (a number of 30 digits) contains 22 as substring.

Together with 321430324201307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321430324201307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160715162100654 + 160715162100655.

It is an arithmetic number, because the mean of its divisors is an integer number (160715162100655).

Almost surely, 2^{321430324201309} is an apocalyptic number.

It is an amenable number.

321430324201309 is a deficient number, since it is larger than the sum of its proper divisors (1).

321430324201309 is an equidigital number, since it uses as much as digits as its factorization.

321430324201309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 37.

The spelling of 321430324201309 in words is "three hundred twenty-one trillion, four hundred thirty billion, three hundred twenty-four million, two hundred one thousand, three hundred nine".