11221161 has 8 divisors (see below), whose sum is σ = 17098944. Its totient is φ = 6412080.

The previous prime is 11221159. The next prime is 11221181. The reversal of 11221161 is 16112211.

It is a happy number.

11221161 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 11221161 - 2¹ = 11221159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11221161.

It is not an unprimeable number, because it can be changed into a prime (11221141) 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, 267150 + ... + 267191.

It is an arithmetic number, because the mean of its divisors is an integer number (2137368).

Almost surely, 2^11221161 is an apocalyptic number.

It is an amenable number.

11221161 is a deficient number, since it is larger than the sum of its proper divisors (5877783).

11221161 is an equidigital number, since it uses as much as digits as its factorization.

11221161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534351.

The product of its digits is 24, while the sum is 15.

The square root of 11221161 is about 3349.8001432921. The cubic root of 11221161 is about 223.8786079612.

Adding to 11221161 its reverse (16112211), we get a palindrome (27333372).

The spelling of 11221161 in words is "eleven million, two hundred twenty-one thousand, one hundred sixty-one".