100201209 has 4 divisors (see below), whose sum is σ = 133601616. Its totient is φ = 66800804.

The previous prime is 100201201. The next prime is 100201229. The reversal of 100201209 is 902102001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100201209 - 2³ = 100201201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100201201) 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, 16700199 + ... + 16700204.

It is an arithmetic number, because the mean of its divisors is an integer number (33400404).

Almost surely, 2^100201209 is an apocalyptic number.

It is an amenable number.

100201209 is a deficient number, since it is larger than the sum of its proper divisors (33400407).

100201209 is an equidigital number, since it uses as much as digits as its factorization.

100201209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33400406.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 100201209 is about 10010.0553944521. The cubic root of 100201209 is about 464.4699846158.

The spelling of 100201209 in words is "one hundred million, two hundred one thousand, two hundred nine".