311323210211311 has 4 divisors (see below), whose sum is σ = 318563284867432. Its totient is φ = 304083135555192.

The previous prime is 311323210211249. The next prime is 311323210211317. The reversal of 311323210211311 is 113112012323113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311323210211311 is a prime.

It is a super-2 number, since 2×311323210211311² (a number of 30 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 (311323210211317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3620037327996 + ... + 3620037328081.

It is an arithmetic number, because the mean of its divisors is an integer number (79640821216858).

Almost surely, 2^{311323210211311} is an apocalyptic number.

311323210211311 is a deficient number, since it is larger than the sum of its proper divisors (7240074656121).

311323210211311 is an equidigital number, since it uses as much as digits as its factorization.

311323210211311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7240074656120.

The product of its (nonzero) digits is 648, while the sum is 25.

Adding to 311323210211311 its reverse (113112012323113), we get a palindrome (424435222534424).

The spelling of 311323210211311 in words is "three hundred eleven trillion, three hundred twenty-three billion, two hundred ten million, two hundred eleven thousand, three hundred eleven".