12123133113 has 32 divisors (see below), whose sum is σ = 19903564800. Its totient is φ = 6391665216.

The previous prime is 12123133097. The next prime is 12123133123. The reversal of 12123133113 is 31133132121.

It is a happy number.

It is not a de Polignac number, because 12123133113 - 2⁴ = 12123133097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 12123133113.

It is not an unprimeable number, because it can be changed into a prime (12123133123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 662278 + ... + 680336.

It is an arithmetic number, because the mean of its divisors is an integer number (621986400).

Almost surely, 2^12123133113 is an apocalyptic number.

12123133113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12123133113 is a deficient number, since it is larger than the sum of its proper divisors (7780431687).

12123133113 is a wasteful number, since it uses less digits than its factorization.

12123133113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20541.

The product of its digits is 324, while the sum is 21.

Adding to 12123133113 its reverse (31133132121), we get a palindrome (43256265234).

The spelling of 12123133113 in words is "twelve billion, one hundred twenty-three million, one hundred thirty-three thousand, one hundred thirteen".