321323220109 has 2 divisors, whose sum is σ = 321323220110. Its totient is φ = 321323220108.

The previous prime is 321323220089. The next prime is 321323220133. The reversal of 321323220109 is 901022323123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 295069499209 + 26253720900 = 543203^2 + 162030^2 .

It is a cyclic number.

It is not a de Polignac number, because 321323220109 - 2⁷ = 321323219981 is a prime.

It is a super-2 number, since 2×321323220109² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321323220139) 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, 160661610054 + 160661610055.

It is an arithmetic number, because the mean of its divisors is an integer number (160661610055).

Almost surely, 2^321323220109 is an apocalyptic number.

It is an amenable number.

321323220109 is a deficient number, since it is larger than the sum of its proper divisors (1).

321323220109 is an equidigital number, since it uses as much as digits as its factorization.

321323220109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 321323220109 in words is "three hundred twenty-one billion, three hundred twenty-three million, two hundred twenty thousand, one hundred nine".