311120321331 has 4 divisors (see below), whose sum is σ = 414827095112. Its totient is φ = 207413547552.

The previous prime is 311120321311. The next prime is 311120321353. The reversal of 311120321331 is 133123021113.

It is a happy number.

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

It is not a de Polignac number, because 311120321331 - 2⁵ = 311120321299 is a prime.

It is a super-2 number, since 2×311120321331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311120321298 and 311120321307.

It is not an unprimeable number, because it can be changed into a prime (311120321311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51853386886 + ... + 51853386891.

It is an arithmetic number, because the mean of its divisors is an integer number (103706773778).

Almost surely, 2^311120321331 is an apocalyptic number.

311120321331 is a deficient number, since it is larger than the sum of its proper divisors (103706773781).

311120321331 is a wasteful number, since it uses less digits than its factorization.

311120321331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103706773780.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 311120321331 its reverse (133123021113), we get a palindrome (444243342444).

The spelling of 311120321331 in words is "three hundred eleven billion, one hundred twenty million, three hundred twenty-one thousand, three hundred thirty-one".