11707221 has 8 divisors (see below), whose sum is σ = 15770944. Its totient is φ = 7724160.

The previous prime is 11707217. The next prime is 11707231. The reversal of 11707221 is 12270711.

It is a happy number.

11707221 is digitally balanced in base 2, 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 not a de Polignac number, because 11707221 - 2² = 11707217 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 (11707231) 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, 19825 + ... + 20406.

It is an arithmetic number, because the mean of its divisors is an integer number (1971368).

Almost surely, 2^11707221 is an apocalyptic number.

It is an amenable number.

11707221 is a deficient number, since it is larger than the sum of its proper divisors (4063723).

11707221 is an equidigital number, since it uses as much as digits as its factorization.

11707221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40331.

The product of its (nonzero) digits is 196, while the sum is 21.

The square root of 11707221 is about 3421.5816518096. The cubic root of 11707221 is about 227.0655622562.

Adding to 11707221 its reverse (12270711), we get a palindrome (23977932).

The spelling of 11707221 in words is "eleven million, seven hundred seven thousand, two hundred twenty-one".