311220024123 has 4 divisors (see below), whose sum is σ = 414960032168. Its totient is φ = 207480016080.

The previous prime is 311220024119. The next prime is 311220024133. The reversal of 311220024123 is 321420022113.

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

It is not a de Polignac number, because 311220024123 - 2² = 311220024119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 311220024123.

It is not an unprimeable number, because it can be changed into a prime (311220024133) 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, 51870004018 + ... + 51870004023.

It is an arithmetic number, because the mean of its divisors is an integer number (103740008042).

Almost surely, 2^311220024123 is an apocalyptic number.

311220024123 is a deficient number, since it is larger than the sum of its proper divisors (103740008045).

311220024123 is a wasteful number, since it uses less digits than its factorization.

311220024123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103740008044.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 311220024123 its reverse (321420022113), we get a palindrome (632640046236).

The spelling of 311220024123 in words is "three hundred eleven billion, two hundred twenty million, twenty-four thousand, one hundred twenty-three".