1231113104123 has 48 divisors (see below), whose sum is σ = 1513335882240. Its totient is φ = 996586867584.

The previous prime is 1231113104119. The next prime is 1231113104153. The reversal of 1231113104123 is 3214013111321.

It is not a de Polignac number, because 1231113104123 - 2² = 1231113104119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (1231113104153) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72911840 + ... + 72928722.

It is an arithmetic number, because the mean of its divisors is an integer number (31527830880).

Almost surely, 2^{1231113104123} is an apocalyptic number.

1231113104123 is a deficient number, since it is larger than the sum of its proper divisors (282222778117).

1231113104123 is a wasteful number, since it uses less digits than its factorization.

1231113104123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17736 (or 17729 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 1231113104123 its reverse (3214013111321), we get a palindrome (4445126215444).

The spelling of 1231113104123 in words is "one trillion, two hundred thirty-one billion, one hundred thirteen million, one hundred four thousand, one hundred twenty-three".