321331311109 has 4 divisors (see below), whose sum is σ = 322179151360. Its totient is φ = 320483470860.

The previous prime is 321331311079. The next prime is 321331311121. The reversal of 321331311109 is 901113133123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 321331311109 - 2¹³ = 321331302917 is a prime.

It is a super-2 number, since 2×321331311109² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321331311139) 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 in 3 ways as a sum of consecutive naturals, for example, 423919557 + ... + 423920314.

It is an arithmetic number, because the mean of its divisors is an integer number (80544787840).

Almost surely, 2^321331311109 is an apocalyptic number.

It is an amenable number.

321331311109 is a deficient number, since it is larger than the sum of its proper divisors (847840251).

321331311109 is an equidigital number, since it uses as much as digits as its factorization.

321331311109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847840250.

The product of its (nonzero) digits is 1458, while the sum is 28.

The spelling of 321331311109 in words is "three hundred twenty-one billion, three hundred thirty-one million, three hundred eleven thousand, one hundred nine".