12172060081 has 2 divisors, whose sum is σ = 12172060082. Its totient is φ = 12172060080.

The previous prime is 12172060057. The next prime is 12172060093. The reversal of 12172060081 is 18006027121.

12172060081 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., 8101620081 + 4070440000 = 90009^2 + 63800^2 .

It is an emirp because it is prime and its reverse (18006027121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12172060081 - 2⁵ = 12172060049 is a prime.

It is a super-2 number, since 2×12172060081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12172060051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6086030040 + 6086030041.

It is an arithmetic number, because the mean of its divisors is an integer number (6086030041).

Almost surely, 2^12172060081 is an apocalyptic number.

It is an amenable number.

12172060081 is a deficient number, since it is larger than the sum of its proper divisors (1).

12172060081 is an equidigital number, since it uses as much as digits as its factorization.

12172060081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 28.

The spelling of 12172060081 in words is "twelve billion, one hundred seventy-two million, sixty thousand, eighty-one".