11607221 has 4 divisors (see below), whose sum is σ = 12007500. Its totient is φ = 11206944.

The previous prime is 11607217. The next prime is 11607227. The reversal of 11607221 is 12270611.

11607221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4774225 + 6832996 = 2185^2 + 2614^2 .

It is a cyclic number.

It is not a de Polignac number, because 11607221 - 2² = 11607217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11607193 and 11607202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11607227) 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, 200096 + ... + 200153.

It is an arithmetic number, because the mean of its divisors is an integer number (3001875).

Almost surely, 2^11607221 is an apocalyptic number.

It is an amenable number.

11607221 is a deficient number, since it is larger than the sum of its proper divisors (400279).

11607221 is an equidigital number, since it uses as much as digits as its factorization.

11607221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400278.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 11607221 is about 3406.9371875630. The cubic root of 11607221 is about 226.4172012739.

Adding to 11607221 its reverse (12270611), we get a palindrome (23877832).

The spelling of 11607221 in words is "eleven million, six hundred seven thousand, two hundred twenty-one".