1231123113 has 24 divisors (see below), whose sum is σ = 1987274016. Its totient is φ = 727934400.

The previous prime is 1231123081. The next prime is 1231123133. The reversal of 1231123113 is 3113211321.

It is not a de Polignac number, because 1231123113 - 2⁵ = 1231123081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231123133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147595 + ... + 155712.

It is an arithmetic number, because the mean of its divisors is an integer number (82803084).

Almost surely, 2^1231123113 is an apocalyptic number.

It is an amenable number.

1231123113 is a deficient number, since it is larger than the sum of its proper divisors (756150903).

1231123113 is a wasteful number, since it uses less digits than its factorization.

1231123113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303365 (or 303362 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1231123113 is about 35087.3640075740. The cubic root of 1231123113 is about 1071.7672814916.

Adding to 1231123113 its reverse (3113211321), we get a palindrome (4344334434).

The spelling of 1231123113 in words is "one billion, two hundred thirty-one million, one hundred twenty-three thousand, one hundred thirteen".