12081161 has 2 divisors, whose sum is σ = 12081162. Its totient is φ = 12081160.

The previous prime is 12081149. The next prime is 12081163. The reversal of 12081161 is 16118021.

12081161 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11971600 + 109561 = 3460^2 + 331^2 .

It is an emirp because it is prime and its reverse (16118021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12081161 - 2¹⁴ = 12064777 is a prime.

It is a super-2 number, since 2×12081161² = 291908902215842, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 12081163, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12081163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6040580 + 6040581.

It is an arithmetic number, because the mean of its divisors is an integer number (6040581).

Almost surely, 2^12081161 is an apocalyptic number.

It is an amenable number.

12081161 is a deficient number, since it is larger than the sum of its proper divisors (1).

12081161 is an equidigital number, since it uses as much as digits as its factorization.

12081161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 20.

The square root of 12081161 is about 3475.7964554905. The cubic root of 12081161 is about 229.4578345206.

Adding to 12081161 its reverse (16118021), we get a palindrome (28199182).

The spelling of 12081161 in words is "twelve million, eighty-one thousand, one hundred sixty-one".