11103221 has 4 divisors (see below), whose sum is σ = 11112192. Its totient is φ = 11094252.

The previous prime is 11103217. The next prime is 11103247. The reversal of 11103221 is 12230111.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11103221 - 2² = 11103217 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11103271) 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, 2261 + ... + 5226.

It is an arithmetic number, because the mean of its divisors is an integer number (2778048).

Almost surely, 2^11103221 is an apocalyptic number.

It is an amenable number.

11103221 is a deficient number, since it is larger than the sum of its proper divisors (8971).

11103221 is an equidigital number, since it uses as much as digits as its factorization.

11103221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8970.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 11103221 is about 3332.1496064853. The cubic root of 11103221 is about 223.0914851831.

Adding to 11103221 its reverse (12230111), we get a palindrome (23333332).

The spelling of 11103221 in words is "eleven million, one hundred three thousand, two hundred twenty-one".