11121209 has 8 divisors (see below), whose sum is σ = 12428640. Its totient is φ = 9863200.

The previous prime is 11121197. The next prime is 11121217. The reversal of 11121209 is 90212111.

11121209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11121209 - 2¹⁶ = 11055673 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11121709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11879 + ... + 12780.

It is an arithmetic number, because the mean of its divisors is an integer number (1553580).

Almost surely, 2^11121209 is an apocalyptic number.

It is an amenable number.

11121209 is a deficient number, since it is larger than the sum of its proper divisors (1307431).

11121209 is a wasteful number, since it uses less digits than its factorization.

11121209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24711.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 11121209 is about 3334.8476726831. The cubic root of 11121209 is about 223.2118948218.

The spelling of 11121209 in words is "eleven million, one hundred twenty-one thousand, two hundred nine".