11220161 has 4 divisors (see below), whose sum is σ = 11232000. Its totient is φ = 11208324.

The previous prime is 11220151. The next prime is 11220179. The reversal of 11220161 is 16102211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11220161 - 2¹⁰ = 11219137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11220151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4361 + ... + 6438.

It is an arithmetic number, because the mean of its divisors is an integer number (2808000).

Almost surely, 2^11220161 is an apocalyptic number.

It is an amenable number.

11220161 is a deficient number, since it is larger than the sum of its proper divisors (11839).

11220161 is a wasteful number, since it uses less digits than its factorization.

11220161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11838.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 11220161 is about 3349.6508773304. The cubic root of 11220161 is about 223.8719572751.

Adding to 11220161 its reverse (16102211), we get a palindrome (27322372).

The spelling of 11220161 in words is "eleven million, two hundred twenty thousand, one hundred sixty-one".