12511122555 has 16 divisors (see below), whose sum is σ = 20020373280. Its totient is φ = 6671739648.

The previous prime is 12511122541. The next prime is 12511122563. The reversal of 12511122555 is 55522111521.

It is not a de Polignac number, because 12511122555 - 2⁵ = 12511122523 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 76959 + ... + 175911.

It is an arithmetic number, because the mean of its divisors is an integer number (1251273330).

Almost surely, 2^12511122555 is an apocalyptic number.

12511122555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12511122555 is a deficient number, since it is larger than the sum of its proper divisors (7509250725).

12511122555 is an equidigital number, since it uses as much as digits as its factorization.

12511122555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107390.

The product of its digits is 5000, while the sum is 30.

The spelling of 12511122555 in words is "twelve billion, five hundred eleven million, one hundred twenty-two thousand, five hundred fifty-five".