12166421135374 has 16 divisors (see below), whose sum is σ = 19908761443200. Its totient is φ = 5530171338360.

The previous prime is 12166421135317. The next prime is 12166421135399. The reversal of 12166421135374 is 47353112466121.

It is a happy number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 6404887 + ... + 8084269.

It is an arithmetic number, because the mean of its divisors is an integer number (1244297590200).

Almost surely, 2^{12166421135374} is an apocalyptic number.

12166421135374 is a deficient number, since it is larger than the sum of its proper divisors (7742340307826).

12166421135374 is a wasteful number, since it uses less digits than its factorization.

12166421135374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008695.

The product of its digits is 725760, while the sum is 46.

The spelling of 12166421135374 in words is "twelve trillion, one hundred sixty-six billion, four hundred twenty-one million, one hundred thirty-five thousand, three hundred seventy-four".