12123317115 has 96 divisors (see below), whose sum is σ = 27000106560. Its totient is φ = 5115737088.

The previous prime is 12123317057. The next prime is 12123317119. The reversal of 12123317115 is 51171332121.

12123317115 is a `hidden beast` number, since 1 + 212 + 331 + 7 + 115 = 666.

It is not a de Polignac number, because 12123317115 - 2⁶ = 12123317051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12123317119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15507 + ... + 156483.

It is an arithmetic number, because the mean of its divisors is an integer number (281251110).

Almost surely, 2^12123317115 is an apocalyptic number.

12123317115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12123317115 is an abundant number, since it is smaller than the sum of its proper divisors (14876789445).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12123317115 is a wasteful number, since it uses less digits than its factorization.

12123317115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141018 (or 141005 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

Adding to 12123317115 its reverse (51171332121), we get a palindrome (63294649236).

The spelling of 12123317115 in words is "twelve billion, one hundred twenty-three million, three hundred seventeen thousand, one hundred fifteen".