11222191 has 4 divisors (see below), whose sum is σ = 11241112. Its totient is φ = 11203272.

The previous prime is 11222177. The next prime is 11222201. The reversal of 11222191 is 19122211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11222191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222161) 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, 8541 + ... + 9766.

It is an arithmetic number, because the mean of its divisors is an integer number (2810278).

Almost surely, 2^11222191 is an apocalyptic number.

11222191 is a deficient number, since it is larger than the sum of its proper divisors (18921).

11222191 is an equidigital number, since it uses as much as digits as its factorization.

11222191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18920.

The product of its digits is 72, while the sum is 19.

The square root of 11222191 is about 3349.9538802795. The cubic root of 11222191 is about 223.8854577548.

The spelling of 11222191 in words is "eleven million, two hundred twenty-two thousand, one hundred ninety-one".