2166106042111 has 4 divisors (see below), whose sum is σ = 2363024773224. Its totient is φ = 1969187311000.

The previous prime is 2166106042081. The next prime is 2166106042123. The reversal of 2166106042111 is 1112406016612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2166106042111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166106042141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98459365540 + ... + 98459365561.

It is an arithmetic number, because the mean of its divisors is an integer number (590756193306).

Almost surely, 2^{2166106042111} is an apocalyptic number.

2166106042111 is a deficient number, since it is larger than the sum of its proper divisors (196918731113).

2166106042111 is a wasteful number, since it uses less digits than its factorization.

2166106042111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196918731112.

The product of its (nonzero) digits is 3456, while the sum is 31.

The spelling of 2166106042111 in words is "two trillion, one hundred sixty-six billion, one hundred six million, forty-two thousand, one hundred eleven".