321213443424457 has 2 divisors, whose sum is σ = 321213443424458. Its totient is φ = 321213443424456.

The previous prime is 321213443424353. The next prime is 321213443424473. The reversal of 321213443424457 is 754424344312123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173627293986441 + 147586149438016 = 13176771^2 + 12148504^2 .

It is a cyclic number.

It is not a de Polignac number, because 321213443424457 - 2⁷ = 321213443424329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 321213443424457.

It is not a weakly prime, because it can be changed into another prime (321213443424557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160606721712228 + 160606721712229.

It is an arithmetic number, because the mean of its divisors is an integer number (160606721712229).

Almost surely, 2^{321213443424457} is an apocalyptic number.

It is an amenable number.

321213443424457 is a deficient number, since it is larger than the sum of its proper divisors (1).

321213443424457 is an equidigital number, since it uses as much as digits as its factorization.

321213443424457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7741440, while the sum is 49.

The spelling of 321213443424457 in words is "three hundred twenty-one trillion, two hundred thirteen billion, four hundred forty-three million, four hundred twenty-four thousand, four hundred fifty-seven".