2121166166 has 32 divisors (see below), whose sum is σ = 3677184000. Its totient is φ = 898886016.

The previous prime is 2121166163. The next prime is 2121166193. The reversal of 2121166166 is 6616611212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121166163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 788075 + ... + 790761.

It is an arithmetic number, because the mean of its divisors is an integer number (114912000).

Almost surely, 2^2121166166 is an apocalyptic number.

2121166166 is a deficient number, since it is larger than the sum of its proper divisors (1556017834).

2121166166 is a wasteful number, since it uses less digits than its factorization.

2121166166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3308.

The product of its digits is 5184, while the sum is 32.

The square root of 2121166166 is about 46056.1197453715. The cubic root of 2121166166 is about 1284.8671638691.

Adding to 2121166166 its reverse (6616611212), we get a palindrome (8737777378).

The spelling of 2121166166 in words is "two billion, one hundred twenty-one million, one hundred sixty-six thousand, one hundred sixty-six".