11055221 has 4 divisors (see below), whose sum is σ = 11139744. Its totient is φ = 10970700.

The previous prime is 11055211. The next prime is 11055229. The reversal of 11055221 is 12255011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11055221 - 2¹⁴ = 11038837 is a prime.

It is a super-2 number, since 2×11055221² = 244435822717682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11055221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11055229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42065 + ... + 42326.

It is an arithmetic number, because the mean of its divisors is an integer number (2784936).

Almost surely, 2^11055221 is an apocalyptic number.

It is an amenable number.

11055221 is a deficient number, since it is larger than the sum of its proper divisors (84523).

11055221 is an equidigital number, since it uses as much as digits as its factorization.

11055221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84522.

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

The square root of 11055221 is about 3324.9392475653. The cubic root of 11055221 is about 222.7695407822.

It can be divided in two parts, 11055 and 221, that multiplied together give a triangular number (2443155 = T₂₂₁₀).

The spelling of 11055221 in words is "eleven million, fifty-five thousand, two hundred twenty-one".