12771846685321 has 4 divisors (see below), whose sum is σ = 12772540939012. Its totient is φ = 12771152431632.

The previous prime is 12771846685309. The next prime is 12771846685361. The reversal of 12771846685321 is 12358664817721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5576233574025 + 7195613111296 = 2361405^2 + 2682464^2 .

It is a cyclic number.

It is not a de Polignac number, because 12771846685321 - 2³⁷ = 12634407731849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12771846685321.

It is not an unprimeable number, because it can be changed into a prime (12771846685361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347099250 + ... + 347136043.

It is an arithmetic number, because the mean of its divisors is an integer number (3193135234753).

Almost surely, 2^{12771846685321} is an apocalyptic number.

It is an amenable number.

12771846685321 is a deficient number, since it is larger than the sum of its proper divisors (694253691).

12771846685321 is an equidigital number, since it uses as much as digits as its factorization.

12771846685321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694253690.

The product of its digits is 27095040, while the sum is 61.

The spelling of 12771846685321 in words is "twelve trillion, seven hundred seventy-one billion, eight hundred forty-six million, six hundred eighty-five thousand, three hundred twenty-one".