321442221137 has 2 divisors, whose sum is σ = 321442221138. Its totient is φ = 321442221136.

The previous prime is 321442221119. The next prime is 321442221143. The reversal of 321442221137 is 731122244123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 274928240896 + 46513980241 = 524336^2 + 215671^2 .

It is a cyclic number.

It is not a de Polignac number, because 321442221137 - 2²⁰ = 321441172561 is a prime.

It is not a weakly prime, because it can be changed into another prime (321442221187) 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, 160721110568 + 160721110569.

It is an arithmetic number, because the mean of its divisors is an integer number (160721110569).

Almost surely, 2^321442221137 is an apocalyptic number.

It is an amenable number.

321442221137 is a deficient number, since it is larger than the sum of its proper divisors (1).

321442221137 is an equidigital number, since it uses as much as digits as its factorization.

321442221137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 32.

The spelling of 321442221137 in words is "three hundred twenty-one billion, four hundred forty-two million, two hundred twenty-one thousand, one hundred thirty-seven".