12115666122505 has 16 divisors (see below), whose sum is σ = 15860984787648. Its totient is φ = 8811128872000.

The previous prime is 12115666122487. The next prime is 12115666122533. The reversal of 12115666122505 is 50522166651121.

It is not a de Polignac number, because 12115666122505 - 2⁴¹ = 9916642866953 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1451311 + ... + 5132020.

It is an arithmetic number, because the mean of its divisors is an integer number (991311549228).

Almost surely, 2^{12115666122505} is an apocalyptic number.

It is an amenable number.

12115666122505 is a deficient number, since it is larger than the sum of its proper divisors (3745318665143).

12115666122505 is a wasteful number, since it uses less digits than its factorization.

12115666122505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6616808.

The product of its (nonzero) digits is 216000, while the sum is 43.

The spelling of 12115666122505 in words is "twelve trillion, one hundred fifteen billion, six hundred sixty-six million, one hundred twenty-two thousand, five hundred five".