12181255771 has 2 divisors, whose sum is σ = 12181255772. Its totient is φ = 12181255770.

The previous prime is 12181255753. The next prime is 12181255783. The reversal of 12181255771 is 17755218121.

It is a strong prime.

It is an emirp because it is prime and its reverse (17755218121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12181255771 - 2⁷ = 12181255643 is a prime.

It is not a weakly prime, because it can be changed into another prime (12181255171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6090627885 + 6090627886.

It is an arithmetic number, because the mean of its divisors is an integer number (6090627886).

Almost surely, 2^12181255771 is an apocalyptic number.

12181255771 is a deficient number, since it is larger than the sum of its proper divisors (1).

12181255771 is an equidigital number, since it uses as much as digits as its factorization.

12181255771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39200, while the sum is 40.

The spelling of 12181255771 in words is "twelve billion, one hundred eighty-one million, two hundred fifty-five thousand, seven hundred seventy-one".