311311303321 has 16 divisors (see below), whose sum is σ = 316978648960. Its totient is φ = 305675441280.

The previous prime is 311311303309. The next prime is 311311303349. The reversal of 311311303321 is 123303113113.

It is a cyclic number.

It is not a de Polignac number, because 311311303321 - 2¹³ = 311311295129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311311303292 and 311311303301.

It is not an unprimeable number, because it can be changed into a prime (311311303361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32726956 + ... + 32736466.

It is an arithmetic number, because the mean of its divisors is an integer number (19811165560).

Almost surely, 2^311311303321 is an apocalyptic number.

It is an amenable number.

311311303321 is a deficient number, since it is larger than the sum of its proper divisors (5667345639).

311311303321 is a wasteful number, since it uses less digits than its factorization.

311311303321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11104.

The product of its (nonzero) digits is 486, while the sum is 22.

Adding to 311311303321 its reverse (123303113113), we get a palindrome (434614416434).

The spelling of 311311303321 in words is "three hundred eleven billion, three hundred eleven million, three hundred three thousand, three hundred twenty-one".