311220002321 has 8 divisors (see below), whose sum is σ = 311676417024. Its totient is φ = 310763743920.

The previous prime is 311220002297. The next prime is 311220002341. The reversal of 311220002321 is 123200022113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 311220002321 - 2⁶ = 311220002257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 311220002321.

It is not an unprimeable number, because it can be changed into a prime (311220002341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4294931 + ... + 4366791.

It is an arithmetic number, because the mean of its divisors is an integer number (38959552128).

Almost surely, 2^311220002321 is an apocalyptic number.

It is an amenable number.

311220002321 is a deficient number, since it is larger than the sum of its proper divisors (456414703).

311220002321 is an equidigital number, since it uses as much as digits as its factorization.

311220002321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78151.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 311220002321 its reverse (123200022113), we get a palindrome (434420024434).

The spelling of 311220002321 in words is "three hundred eleven billion, two hundred twenty million, two thousand, three hundred twenty-one".