11221155 has 24 divisors (see below), whose sum is σ = 21219120. Its totient is φ = 5440320.

The previous prime is 11221141. The next prime is 11221159. The reversal of 11221155 is 55112211.

11221155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11221155 - 2⁵ = 11221123 is a prime.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (11221159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10840 + ... + 11829.

It is an arithmetic number, because the mean of its divisors is an integer number (884130).

Almost surely, 2^11221155 is an apocalyptic number.

11221155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11221155 is a deficient number, since it is larger than the sum of its proper divisors (9997965).

11221155 is a wasteful number, since it uses less digits than its factorization.

11221155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22691 (or 22688 counting only the distinct ones).

The product of its digits is 100, while the sum is 18.

The square root of 11221155 is about 3349.7992477162. The cubic root of 11221155 is about 223.8785680582.

Adding to 11221155 its reverse (55112211), we get a palindrome (66333366).

The spelling of 11221155 in words is "eleven million, two hundred twenty-one thousand, one hundred fifty-five".