311220304311 has 8 divisors (see below), whose sum is σ = 474240463744. Its totient is φ = 177840173880.

The previous prime is 311220304253. The next prime is 311220304319. The reversal of 311220304311 is 113403022113.

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

It is not a de Polignac number, because 311220304311 - 2¹⁰ = 311220303287 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 14820014491 = 311220304311 / (3 + 1 + 1 + 2 + 2 + 0 + 3 + 0 + 4 + 3 + 1 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311220304319) 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, 7410007225 + ... + 7410007266.

It is an arithmetic number, because the mean of its divisors is an integer number (59280057968).

Almost surely, 2^311220304311 is an apocalyptic number.

311220304311 is a deficient number, since it is larger than the sum of its proper divisors (163020159433).

311220304311 is a wasteful number, since it uses less digits than its factorization.

311220304311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14820014501.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 311220304311 its reverse (113403022113), we get a palindrome (424623326424).

The spelling of 311220304311 in words is "three hundred eleven billion, two hundred twenty million, three hundred four thousand, three hundred eleven".