12118322555 has 4 divisors (see below), whose sum is σ = 14541987072. Its totient is φ = 9694658040.

The previous prime is 12118322527. The next prime is 12118322581. The reversal of 12118322555 is 55522381121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55522381121 = 57991 ⋅957431.

It is not a de Polignac number, because 12118322555 - 2²² = 12114128251 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1211832251 + ... + 1211832260.

It is an arithmetic number, because the mean of its divisors is an integer number (3635496768).

Almost surely, 2^12118322555 is an apocalyptic number.

12118322555 is a deficient number, since it is larger than the sum of its proper divisors (2423664517).

12118322555 is an equidigital number, since it uses as much as digits as its factorization.

12118322555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2423664516.

The product of its digits is 24000, while the sum is 35.

The spelling of 12118322555 in words is "twelve billion, one hundred eighteen million, three hundred twenty-two thousand, five hundred fifty-five".