11110221 has 12 divisors (see below), whose sum is σ = 16440060. Its totient is φ = 7225920.

The previous prime is 11110217. The next prime is 11110223. The reversal of 11110221 is 12201111.

It is a happy number.

11110221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1929321 + 9180900 = 1389^2 + 3030^2 .

It is not a de Polignac number, because 11110221 - 2² = 11110217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11110223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14686 + ... + 15423.

It is an arithmetic number, because the mean of its divisors is an integer number (1370005).

Almost surely, 2^11110221 is an apocalyptic number.

It is an amenable number.

11110221 is a deficient number, since it is larger than the sum of its proper divisors (5329839).

11110221 is a wasteful number, since it uses less digits than its factorization.

11110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30156 (or 30153 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 11110221 is about 3333.1998139926. The cubic root of 11110221 is about 223.1383578379.

Adding to 11110221 its reverse (12201111), we get a palindrome (23311332).

The spelling of 11110221 in words is "eleven million, one hundred ten thousand, two hundred twenty-one".