11333221 has 4 divisors (see below), whose sum is σ = 11340000. Its totient is φ = 11326444.

The previous prime is 11333207. The next prime is 11333243. The reversal of 11333221 is 12233311.

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 11333221 - 2⁹ = 11332709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11333195 and 11333204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11333821) 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, 1110 + ... + 4888.

It is an arithmetic number, because the mean of its divisors is an integer number (2835000).

Almost surely, 2^11333221 is an apocalyptic number.

It is an amenable number.

11333221 is a deficient number, since it is larger than the sum of its proper divisors (6779).

11333221 is an equidigital number, since it uses as much as digits as its factorization.

11333221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6778.

The product of its digits is 108, while the sum is 16.

The square root of 11333221 is about 3366.4849620933. The cubic root of 11333221 is about 224.6213945571.

Adding to 11333221 its reverse (12233311), we get a palindrome (23566532).

The spelling of 11333221 in words is "eleven million, three hundred thirty-three thousand, two hundred twenty-one".