1232123113 has 4 divisors (see below), whose sum is σ = 1326901828. Its totient is φ = 1137344400.

The previous prime is 1232123069. The next prime is 1232123143. The reversal of 1232123113 is 3113212321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3113212321 = 29 ⋅107352149.

It can be written as a sum of positive squares in 2 ways, for example, as 547934464 + 684188649 = 23408^2 + 26157^2 .

It is a cyclic number.

It is not a de Polignac number, because 1232123113 - 2⁹ = 1232122601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1232123143) 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, 47389338 + ... + 47389363.

It is an arithmetic number, because the mean of its divisors is an integer number (331725457).

Almost surely, 2^1232123113 is an apocalyptic number.

1232123113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1232123113 is a deficient number, since it is larger than the sum of its proper divisors (94778715).

1232123113 is an equidigital number, since it uses as much as digits as its factorization.

1232123113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94778714.

The product of its digits is 216, while the sum is 19.

The square root of 1232123113 is about 35101.6112593140. The cubic root of 1232123113 is about 1072.0573898255.

Adding to 1232123113 its reverse (3113212321), we get a palindrome (4345335434).

The spelling of 1232123113 in words is "one billion, two hundred thirty-two million, one hundred twenty-three thousand, one hundred thirteen".