11201209 has 4 divisors (see below), whose sum is σ = 11391120. Its totient is φ = 11011300.

The previous prime is 11201189. The next prime is 11201219. The reversal of 11201209 is 90210211.

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 11201209 - 2⁹ = 11200697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11201192 and 11201201.

It is not an unprimeable number, because it can be changed into a prime (11201219) 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, 94867 + ... + 94984.

It is an arithmetic number, because the mean of its divisors is an integer number (2847780).

Almost surely, 2^11201209 is an apocalyptic number.

It is an amenable number.

11201209 is a deficient number, since it is larger than the sum of its proper divisors (189911).

11201209 is an equidigital number, since it uses as much as digits as its factorization.

11201209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189910.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 11201209 is about 3346.8207301856. The cubic root of 11201209 is about 223.7458386917.

The spelling of 11201209 in words is "eleven million, two hundred one thousand, two hundred nine".