11221055 has 4 divisors (see below), whose sum is σ = 13465272. Its totient is φ = 8976840.

The previous prime is 11221051. The next prime is 11221061. The reversal of 11221055 is 55012211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55012211 = 509 ⋅108079.

It is not a de Polignac number, because 11221055 - 2² = 11221051 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 (11221051) 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, 1122101 + ... + 1122110.

It is an arithmetic number, because the mean of its divisors is an integer number (3366318).

Almost surely, 2^11221055 is an apocalyptic number.

11221055 is a deficient number, since it is larger than the sum of its proper divisors (2244217).

11221055 is an equidigital number, since it uses as much as digits as its factorization.

11221055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244216.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 11221055 is about 3349.7843214153. The cubic root of 11221055 is about 223.8779030072.

Adding to 11221055 its reverse (55012211), we get a palindrome (66233266).

The spelling of 11221055 in words is "eleven million, two hundred twenty-one thousand, fifty-five".