12192181 has 2 divisors, whose sum is σ = 12192182. Its totient is φ = 12192180.

The previous prime is 12192161. The next prime is 12192197. The reversal of 12192181 is 18129121.

12192181 is digitally balanced in base 2, 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., 8071281 + 4120900 = 2841^2 + 2030^2 .

It is an emirp because it is prime and its reverse (18129121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12192181 - 2¹¹ = 12190133 is a prime.

It is a super-2 number, since 2×12192181² = 297298555073522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12192101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6096090 + 6096091.

It is an arithmetic number, because the mean of its divisors is an integer number (6096091).

Almost surely, 2^12192181 is an apocalyptic number.

It is an amenable number.

12192181 is a deficient number, since it is larger than the sum of its proper divisors (1).

12192181 is an equidigital number, since it uses as much as digits as its factorization.

12192181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 25.

The square root of 12192181 is about 3491.7303733250. The cubic root of 12192181 is about 230.1585611108.

The spelling of 12192181 in words is "twelve million, one hundred ninety-two thousand, one hundred eighty-one".