12771522105887 has 2 divisors, whose sum is σ = 12771522105888. Its totient is φ = 12771522105886.

The previous prime is 12771522105863. The next prime is 12771522105907. The reversal of 12771522105887 is 78850122517721.

It is a strong prime.

It is an emirp because it is prime and its reverse (78850122517721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12771522105887 - 2¹² = 12771522101791 is a prime.

It is a super-2 number, since 2×12771522105887² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12771522105187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6385761052943 + 6385761052944.

It is an arithmetic number, because the mean of its divisors is an integer number (6385761052944).

Almost surely, 2^{12771522105887} is an apocalyptic number.

12771522105887 is a deficient number, since it is larger than the sum of its proper divisors (1).

12771522105887 is an equidigital number, since it uses as much as digits as its factorization.

12771522105887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4390400, while the sum is 56.

The spelling of 12771522105887 in words is "twelve trillion, seven hundred seventy-one billion, five hundred twenty-two million, one hundred five thousand, eight hundred eighty-seven".