11580221 has 4 divisors (see below), whose sum is σ = 11587200. Its totient is φ = 11573244.

The previous prime is 11580203. The next prime is 11580227. The reversal of 11580221 is 12208511.

It is a happy number.

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 11580221 - 2⁶ = 11580157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11580193 and 11580202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11580227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 590 + ... + 4848.

It is an arithmetic number, because the mean of its divisors is an integer number (2896800).

Almost surely, 2^11580221 is an apocalyptic number.

It is an amenable number.

11580221 is a deficient number, since it is larger than the sum of its proper divisors (6979).

11580221 is an equidigital number, since it uses as much as digits as its factorization.

11580221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6978.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 11580221 is about 3402.9723772020. The cubic root of 11580221 is about 226.2415057401.

Adding to 11580221 its reverse (12208511), we get a palindrome (23788732).

The spelling of 11580221 in words is "eleven million, five hundred eighty thousand, two hundred twenty-one".