2121166 has 8 divisors (see below), whose sum is σ = 3241944. Its totient is φ = 1040520.

The previous prime is 2121143. The next prime is 2121167. The reversal of 2121166 is 6611212.

2121166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

2121166 is a modest number, since divided by 1166 gives 212 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9900 + ... + 10111.

It is an arithmetic number, because the mean of its divisors is an integer number (405243).

2^2121166 is an apocalyptic number.

2121166 is a deficient number, since it is larger than the sum of its proper divisors (1120778).

2121166 is a wasteful number, since it uses less digits than its factorization.

2121166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20066.

The product of its digits is 144, while the sum is 19.

The square root of 2121166 is about 1456.4223288593. The cubic root of 2121166 is about 128.4867130352.

Adding to 2121166 its reverse (6611212), we get a palindrome (8732378).

It can be divided in two parts, 212 and 1166, that added together give a triangular number (1378 = T₅₂).

The spelling of 2121166 in words is "two million, one hundred twenty-one thousand, one hundred sixty-six".