11559221 has 4 divisors (see below), whose sum is σ = 11755200. Its totient is φ = 11363244.

The previous prime is 11559209. The next prime is 11559241. The reversal of 11559221 is 12295511.

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 an emirpimes, since its reverse is a distinct semiprime: 12295511 = 181 ⋅67931.

It is a cyclic number.

It is not a de Polignac number, because 11559221 - 2⁶ = 11559157 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 (11559241) 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, 97901 + ... + 98018.

It is an arithmetic number, because the mean of its divisors is an integer number (2938800).

Almost surely, 2^11559221 is an apocalyptic number.

It is an amenable number.

11559221 is a deficient number, since it is larger than the sum of its proper divisors (195979).

11559221 is an equidigital number, since it uses as much as digits as its factorization.

11559221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195978.

The product of its digits is 900, while the sum is 26.

The square root of 11559221 is about 3399.8854392464. The cubic root of 11559221 is about 226.1046647581.

The spelling of 11559221 in words is "eleven million, five hundred fifty-nine thousand, two hundred twenty-one".