11211009 has 4 divisors (see below), whose sum is σ = 14948016. Its totient is φ = 7474004.

The previous prime is 11210993. The next prime is 11211029. The reversal of 11211009 is 90011211.

11211009 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 11211009 - 2⁴ = 11210993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11211029) 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, 1868499 + ... + 1868504.

It is an arithmetic number, because the mean of its divisors is an integer number (3737004).

Almost surely, 2^11211009 is an apocalyptic number.

It is an amenable number.

11211009 is a deficient number, since it is larger than the sum of its proper divisors (3737007).

11211009 is an equidigital number, since it uses as much as digits as its factorization.

11211009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3737006.

The product of its (nonzero) digits is 18, while the sum is 15.

The square root of 11211009 is about 3348.2844861212. The cubic root of 11211009 is about 223.8110718303.

The spelling of 11211009 in words is "eleven million, two hundred eleven thousand, nine".