11636221 has 8 divisors (see below), whose sum is σ = 12085920. Its totient is φ = 11189808.

The previous prime is 11636201. The next prime is 11636231. The reversal of 11636221 is 12263611.

11636221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 11636221 - 2⁹ = 11635709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11636192 and 11636201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11636201) 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, 8250 + ... + 9556.

It is an arithmetic number, because the mean of its divisors is an integer number (1510740).

Almost surely, 2^11636221 is an apocalyptic number.

It is an amenable number.

11636221 is a deficient number, since it is larger than the sum of its proper divisors (449699).

11636221 is a wasteful number, since it uses less digits than its factorization.

11636221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643.

The product of its digits is 432, while the sum is 22.

The square root of 11636221 is about 3411.1905546305. The cubic root of 11636221 is about 226.6056080732.

Adding to 11636221 its reverse (12263611), we get a palindrome (23899832).

The spelling of 11636221 in words is "eleven million, six hundred thirty-six thousand, two hundred twenty-one".