311123012331 has 16 divisors (see below), whose sum is σ = 428656104704. Its totient is φ = 200571414624.

The previous prime is 311123012323. The next prime is 311123012381. The reversal of 311123012331 is 133210321113.

It is a happy number.

It is not a de Polignac number, because 311123012331 - 2³ = 311123012323 is a prime.

It is a super-2 number, since 2×311123012331² (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 = 311123012298 and 311123012307.

It is not an unprimeable number, because it can be changed into a prime (311123012381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8579791 + ... + 8615976.

It is an arithmetic number, because the mean of its divisors is an integer number (26791006544).

Almost surely, 2^311123012331 is an apocalyptic number.

311123012331 is a deficient number, since it is larger than the sum of its proper divisors (117533092373).

311123012331 is a wasteful number, since it uses less digits than its factorization.

311123012331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17195970.

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

Adding to 311123012331 its reverse (133210321113), we get a palindrome (444333333444).

The spelling of 311123012331 in words is "three hundred eleven billion, one hundred twenty-three million, twelve thousand, three hundred thirty-one".