11365221 has 8 divisors (see below), whose sum is σ = 17318464. Its totient is φ = 6494400.

The previous prime is 11365217. The next prime is 11365223. The reversal of 11365221 is 12256311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11365221 - 2² = 11365217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 541201 = 11365221 / (1 + 1 + 3 + 6 + 5 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11365223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270580 + ... + 270621.

It is an arithmetic number, because the mean of its divisors is an integer number (2164808).

Almost surely, 2^11365221 is an apocalyptic number.

It is an amenable number.

11365221 is a deficient number, since it is larger than the sum of its proper divisors (5953243).

11365221 is an equidigital number, since it uses as much as digits as its factorization.

11365221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541211.

The product of its digits is 360, while the sum is 21.

The square root of 11365221 is about 3371.2343436789. The cubic root of 11365221 is about 224.8326063589.

The spelling of 11365221 in words is "eleven million, three hundred sixty-five thousand, two hundred twenty-one".