100201 has 4 divisors (see below), whose sum is σ = 101332. Its totient is φ = 99072.

The previous prime is 100193. The next prime is 100207. The reversal of 100201 is 102001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76176 + 24025 = 276^2 + 155^2 .

It is a cyclic number.

It is not a de Polignac number, because 100201 - 2³ = 100193 is a prime.

It is a Duffinian number.

100201 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420 + ... + 613.

It is an arithmetic number, because the mean of its divisors is an integer number (25333).

2¹⁰⁰²⁰¹ is an apocalyptic number.

It is an amenable number.

100201 is a deficient number, since it is larger than the sum of its proper divisors (1131).

100201 is an equidigital number, since it uses as much as digits as its factorization.

100201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130.

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

The square root of 100201 is about 316.5454153830. The cubic root of 100201 is about 46.4469661685.

Adding to 100201 its reverse (102001), we get a palindrome (202202).

Multiplying 100201 by its reverse (102001), we get a palindrome (10220602201).

It can be divided in two parts, 100 and 201, that multiplied together give a triangular number (20100 = T₂₀₀).

The spelling of 100201 in words is "one hundred thousand, two hundred one", and thus it is an iban number.