11228111 has 4 divisors (see below), whose sum is σ = 11242800. Its totient is φ = 11213424.

The previous prime is 11228089. The next prime is 11228167. The reversal of 11228111 is 11182211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11182211 = 59 ⋅189529.

It is a cyclic number.

It is not a de Polignac number, because 11228111 - 2⁶ = 11228047 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 11228111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11228171) 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, 6131 + ... + 7748.

It is an arithmetic number, because the mean of its divisors is an integer number (2810700).

Almost surely, 2^11228111 is an apocalyptic number.

11228111 is a deficient number, since it is larger than the sum of its proper divisors (14689).

11228111 is an equidigital number, since it uses as much as digits as its factorization.

11228111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14688.

The product of its digits is 32, while the sum is 17.

The square root of 11228111 is about 3350.8373580346. The cubic root of 11228111 is about 223.9248193173.

The spelling of 11228111 in words is "eleven million, two hundred twenty-eight thousand, one hundred eleven".