201100 has 18 divisors (see below), whose sum is σ = 436604. Its totient is φ = 80400.

The previous prime is 201073. The next prime is 201101. The reversal of 201100 is 1102.

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

It is a self number, because there is not a number n which added to its sum of digits gives 201100.

It is not an unprimeable number, because it can be changed into a prime (201101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 906 + ... + 1105.

2²⁰¹¹⁰⁰ is an apocalyptic number.

201100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201100 is an abundant number, since it is smaller than the sum of its proper divisors (235504).

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

201100 is a wasteful number, since it uses less digits than its factorization.

201100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2025 (or 2018 counting only the distinct ones).

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

The square root of 201100 is about 448.4417464956. The cubic root of 201100 is about 58.5873727874.

Adding to 201100 its reverse (1102), we get a palindrome (202202).

The spelling of 201100 in words is "two hundred one thousand, one hundred", and thus it is an iban number.