12166605112122 has 24 divisors (see below), whose sum is σ = 26732259122400. Its totient is φ = 3998414825160.

The previous prime is 12166605112073. The next prime is 12166605112127. The reversal of 12166605112122 is 22121150666121.

It is not an unprimeable number, because it can be changed into a prime (12166605112127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4760016372 + ... + 4760018927.

It is an arithmetic number, because the mean of its divisors is an integer number (1113844130100).

Almost surely, 2^{12166605112122} is an apocalyptic number.

12166605112122 is an abundant number, since it is smaller than the sum of its proper divisors (14565654010278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12166605112122 is a wasteful number, since it uses less digits than its factorization.

12166605112122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9520035378 (or 9520035375 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

Adding to 12166605112122 its reverse (22121150666121), we get a palindrome (34287755778243).

The spelling of 12166605112122 in words is "twelve trillion, one hundred sixty-six billion, six hundred five million, one hundred twelve thousand, one hundred twenty-two".