12205161 has 12 divisors (see below), whose sum is σ = 18282992. Its totient is φ = 8136612.

The previous prime is 12205159. The next prime is 12205177. The reversal of 12205161 is 16150221.

It is not a de Polignac number, because 12205161 - 2¹ = 12205159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12205121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24871 + ... + 25356.

Almost surely, 2^12205161 is an apocalyptic number.

It is an amenable number.

12205161 is a deficient number, since it is larger than the sum of its proper divisors (6077831).

12205161 is an frugal number, since it uses more digits than its factorization.

12205161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50242 (or 50230 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 12205161 is about 3493.5885561983. The cubic root of 12205161 is about 230.2402090289.

Adding to 12205161 its reverse (16150221), we get a palindrome (28355382).

The spelling of 12205161 in words is "twelve million, two hundred five thousand, one hundred sixty-one".