321004234520243 has 2 divisors, whose sum is σ = 321004234520244. Its totient is φ = 321004234520242.

The previous prime is 321004234520237. The next prime is 321004234520273. The reversal of 321004234520243 is 342025432400123.

It is a weak prime.

It is an emirp because it is prime and its reverse (342025432400123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321004234520243 - 2²⁶ = 321004167411379 is a prime.

It is not a weakly prime, because it can be changed into another prime (321004234520273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160502117260121 + 160502117260122.

It is an arithmetic number, because the mean of its divisors is an integer number (160502117260122).

Almost surely, 2^{321004234520243} is an apocalyptic number.

321004234520243 is a deficient number, since it is larger than the sum of its proper divisors (1).

321004234520243 is an equidigital number, since it uses as much as digits as its factorization.

321004234520243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 35.

Adding to 321004234520243 its reverse (342025432400123), we get a palindrome (663029666920366).

The spelling of 321004234520243 in words is "three hundred twenty-one trillion, four billion, two hundred thirty-four million, five hundred twenty thousand, two hundred forty-three".