311200031123 has 4 divisors (see below), whose sum is σ = 311712717120. Its totient is φ = 310687345128.

The previous prime is 311200031053. The next prime is 311200031147. The reversal of 311200031123 is 321130002113.

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

It is a cyclic number.

It is not a de Polignac number, because 311200031123 - 2³⁶ = 242480554387 is a prime.

It is a super-2 number, since 2×311200031123² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311200031423) 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, 256342088 + ... + 256343301.

It is an arithmetic number, because the mean of its divisors is an integer number (77928179280).

Almost surely, 2^311200031123 is an apocalyptic number.

311200031123 is a deficient number, since it is larger than the sum of its proper divisors (512685997).

311200031123 is an equidigital number, since it uses as much as digits as its factorization.

311200031123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512685996.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 311200031123 its reverse (321130002113), we get a palindrome (632330033236).

The spelling of 311200031123 in words is "three hundred eleven billion, two hundred million, thirty-one thousand, one hundred twenty-three".