11090221 has 2 divisors, whose sum is σ = 11090222. Its totient is φ = 11090220.

The previous prime is 11090207. The next prime is 11090237. The reversal of 11090221 is 12209011.

11090221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (11090237) can be obtained adding 11090221 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11055625 + 34596 = 3325^2 + 186^2 .

It is an emirp because it is prime and its reverse (12209011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11090221 - 2¹⁷ = 10959149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11090195 and 11090204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11090251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5545110 + 5545111.

It is an arithmetic number, because the mean of its divisors is an integer number (5545111).

Almost surely, 2^11090221 is an apocalyptic number.

It is an amenable number.

11090221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11090221 is an equidigital number, since it uses as much as digits as its factorization.

11090221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 11090221 is about 3330.1983424415. The cubic root of 11090221 is about 223.0043836738.

Adding to 11090221 its reverse (12209011), we get a palindrome (23299232).

It can be divided in two parts, 11090 and 221, that added together give a palindrome (11311).

The spelling of 11090221 in words is "eleven million, ninety thousand, two hundred twenty-one".