321320230081 has 2 divisors, whose sum is σ = 321320230082. Its totient is φ = 321320230080.

The previous prime is 321320230079. The next prime is 321320230087. The reversal of 321320230081 is 180032023123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211218372225 + 110101857856 = 459585^2 + 331816^2 .

It is an emirp because it is prime and its reverse (180032023123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321320230081 - 2¹ = 321320230079 is a prime.

It is a super-2 number, since 2×321320230081² (a number of 24 digits) contains 22 as substring.

Together with 321320230079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (321320230087) 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, 160660115040 + 160660115041.

It is an arithmetic number, because the mean of its divisors is an integer number (160660115041).

Almost surely, 2^321320230081 is an apocalyptic number.

It is an amenable number.

321320230081 is a deficient number, since it is larger than the sum of its proper divisors (1).

321320230081 is an equidigital number, since it uses as much as digits as its factorization.

321320230081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The spelling of 321320230081 in words is "three hundred twenty-one billion, three hundred twenty million, two hundred thirty thousand, eighty-one".