12125510115 has 32 divisors (see below), whose sum is σ = 19534749696. Its totient is φ = 6422367360.

The previous prime is 12125510113. The next prime is 12125510149. The reversal of 12125510115 is 51101552121.

It is not a de Polignac number, because 12125510115 - 2¹ = 12125510113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12125510113) 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 31 ways as a sum of consecutive naturals, for example, 5286909 + ... + 5289201.

It is an arithmetic number, because the mean of its divisors is an integer number (610460928).

Almost surely, 2^12125510115 is an apocalyptic number.

12125510115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12125510115 is a deficient number, since it is larger than the sum of its proper divisors (7409239581).

12125510115 is a wasteful number, since it uses less digits than its factorization.

12125510115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4579.

The product of its (nonzero) digits is 500, while the sum is 24.

The spelling of 12125510115 in words is "twelve billion, one hundred twenty-five million, five hundred ten thousand, one hundred fifteen".