11000221 has 4 divisors (see below), whose sum is σ = 11579200. Its totient is φ = 10421244.

The previous prime is 11000189. The next prime is 11000273. The reversal of 11000221 is 12200011.

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.

It is a cyclic number.

It is not a de Polignac number, because 11000221 - 2⁵ = 11000189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11000281) 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, 289461 + ... + 289498.

It is an arithmetic number, because the mean of its divisors is an integer number (2894800).

Almost surely, 2^11000221 is an apocalyptic number.

It is an amenable number.

11000221 is a deficient number, since it is larger than the sum of its proper divisors (578979).

11000221 is an equidigital number, since it uses as much as digits as its factorization.

11000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578978.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 11000221 is about 3316.6581071916. The cubic root of 11000221 is about 222.3994984397.

Adding to 11000221 its reverse (12200011), we get a palindrome (23200232).

The spelling of 11000221 in words is "eleven million, two hundred twenty-one", and thus it is an aban number.