2001100 has 18 divisors (see below), whose sum is σ = 4342604. Its totient is φ = 800400.

The previous prime is 2001079. The next prime is 2001101. The reversal of 2001100 is 11002.

It is a Harshad number since it is a multiple of its sum of digits (4).

2001100 is a modest number, since divided by 1100 gives 200 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 2001100.

It is not an unprimeable number, because it can be changed into a prime (2001101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9906 + ... + 10105.

2^2001100 is an apocalyptic number.

2001100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001100 is an abundant number, since it is smaller than the sum of its proper divisors (2341504).

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

2001100 is a wasteful number, since it uses less digits than its factorization.

2001100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20025 (or 20018 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 4.

The square root of 2001100 is about 1414.6024176425. The cubic root of 2001100 is about 126.0151993086.

Adding to 2001100 its reverse (11002), we get a palindrome (2012102).

The spelling of 2001100 in words is "two million, one thousand, one hundred".