2121171 has 16 divisors (see below), whose sum is σ = 3075744. Its totient is φ = 1292544.

The previous prime is 2121167. The next prime is 2121181. The reversal of 2121171 is 1711212.

2121171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2121171 - 2² = 2121167 is a prime.

It is a super-2 number, since 2×2121171² = 8998732822482, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121171.

It is not an unprimeable number, because it can be changed into a prime (2121121) 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 15 ways as a sum of consecutive naturals, for example, 5145 + ... + 5541.

It is an arithmetic number, because the mean of its divisors is an integer number (192234).

2^2121171 is an apocalyptic number.

2121171 is a deficient number, since it is larger than the sum of its proper divisors (954573).

2121171 is a wasteful number, since it uses less digits than its factorization.

2121171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550.

The product of its digits is 28, while the sum is 15.

The square root of 2121171 is about 1456.4240453934. The cubic root of 2121171 is about 128.4868139911.

Adding to 2121171 its reverse (1711212), we get a palindrome (3832383).

The spelling of 2121171 in words is "two million, one hundred twenty-one thousand, one hundred seventy-one".