321300021457 has 2 divisors, whose sum is σ = 321300021458. Its totient is φ = 321300021456.

The previous prime is 321300021421. The next prime is 321300021463. The reversal of 321300021457 is 754120003123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 311845181761 + 9454839696 = 558431^2 + 97236^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321300021457 is a prime.

It is not a weakly prime, because it can be changed into another prime (321300021257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160650010728 + 160650010729.

It is an arithmetic number, because the mean of its divisors is an integer number (160650010729).

Almost surely, 2^321300021457 is an apocalyptic number.

It is an amenable number.

321300021457 is a deficient number, since it is larger than the sum of its proper divisors (1).

321300021457 is an equidigital number, since it uses as much as digits as its factorization.

321300021457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The spelling of 321300021457 in words is "three hundred twenty-one billion, three hundred million, twenty-one thousand, four hundred fifty-seven".