311123230123 has 4 divisors (see below), whose sum is σ = 311143848048. Its totient is φ = 311102612200.

The previous prime is 311123230111. The next prime is 311123230139. The reversal of 311123230123 is 321032321113.

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 311123230123 - 2⁹ = 311123229611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311123230094 and 311123230103.

It is not an unprimeable number, because it can be changed into a prime (311123230153) 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, 10286311 + ... + 10316512.

It is an arithmetic number, because the mean of its divisors is an integer number (77785962012).

Almost surely, 2^311123230123 is an apocalyptic number.

311123230123 is a deficient number, since it is larger than the sum of its proper divisors (20617925).

311123230123 is a wasteful number, since it uses less digits than its factorization.

311123230123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20617924.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 311123230123 its reverse (321032321113), we get a palindrome (632155551236).

The spelling of 311123230123 in words is "three hundred eleven billion, one hundred twenty-three million, two hundred thirty thousand, one hundred twenty-three".