321131233309 has 2 divisors, whose sum is σ = 321131233310. Its totient is φ = 321131233308.

The previous prime is 321131233289. The next prime is 321131233349. The reversal of 321131233309 is 903332131123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271144111225 + 49987122084 = 520715^2 + 223578^2 .

It is a cyclic number.

It is not a de Polignac number, because 321131233309 - 2⁹ = 321131232797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321131233349) 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, 160565616654 + 160565616655.

It is an arithmetic number, because the mean of its divisors is an integer number (160565616655).

Almost surely, 2^321131233309 is an apocalyptic number.

It is an amenable number.

321131233309 is a deficient number, since it is larger than the sum of its proper divisors (1).

321131233309 is an equidigital number, since it uses as much as digits as its factorization.

321131233309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 31.

The spelling of 321131233309 in words is "three hundred twenty-one billion, one hundred thirty-one million, two hundred thirty-three thousand, three hundred nine".