11222891 has 4 divisors (see below), whose sum is σ = 11230272. Its totient is φ = 11215512.

The previous prime is 11222867. The next prime is 11222917. The reversal of 11222891 is 19822211.

11222891 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 brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 19822211 = 593 ⋅33427.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11222891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11222891.

It is not an unprimeable number, because it can be changed into a prime (11222851) 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, 476 + ... + 4761.

It is an arithmetic number, because the mean of its divisors is an integer number (2807568).

Almost surely, 2^11222891 is an apocalyptic number.

11222891 is a deficient number, since it is larger than the sum of its proper divisors (7381).

11222891 is an equidigital number, since it uses as much as digits as its factorization.

11222891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7380.

The product of its digits is 576, while the sum is 26.

The square root of 11222891 is about 3350.0583577007. The cubic root of 11222891 is about 223.8901127151.

The spelling of 11222891 in words is "eleven million, two hundred twenty-two thousand, eight hundred ninety-one".