2161100 has 18 divisors (see below), whose sum is σ = 4689804. Its totient is φ = 864400.

The previous prime is 2161087. The next prime is 2161121. The reversal of 2161100 is 11612.

2161100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 10706 + ... + 10905.

2^2161100 is an apocalyptic number.

2161100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2161100 is an abundant number, since it is smaller than the sum of its proper divisors (2528704).

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

2161100 is a wasteful number, since it uses less digits than its factorization.

2161100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21625 (or 21618 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 2161100 is about 1470.0680256369. The cubic root of 2161100 is about 129.2880209943.

Adding to 2161100 its reverse (11612), we get a palindrome (2172712).

The spelling of 2161100 in words is "two million, one hundred sixty-one thousand, one hundred".