11222009 has 4 divisors (see below), whose sum is σ = 11333220. Its totient is φ = 11110800.

The previous prime is 11221993. The next prime is 11222021. The reversal of 11222009 is 90022211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90022211 = 1447 ⋅62213.

It can be written as a sum of positive squares in 2 ways, for example, as 10582009 + 640000 = 3253^2 + 800^2 .

It is a cyclic number.

It is not a de Polignac number, because 11222009 - 2⁴ = 11221993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11222039) 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, 55454 + ... + 55655.

It is an arithmetic number, because the mean of its divisors is an integer number (2833305).

Almost surely, 2^11222009 is an apocalyptic number.

It is an amenable number.

11222009 is a deficient number, since it is larger than the sum of its proper divisors (111211).

11222009 is a wasteful number, since it uses less digits than its factorization.

11222009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111210.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 11222009 is about 3349.9267156163. The cubic root of 11222009 is about 223.8842474334.

The spelling of 11222009 in words is "eleven million, two hundred twenty-two thousand, nine".