12771214435121 has 4 divisors (see below), whose sum is σ = 12771296156772. Its totient is φ = 12771132713472.

The previous prime is 12771214435073. The next prime is 12771214435153. The reversal of 12771214435121 is 12153441217721.

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 8706252804496 + 4064961630625 = 2950636^2 + 2016175^2 .

It is a cyclic number.

It is not a de Polignac number, because 12771214435121 - 2²⁶ = 12771147326257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12771214435321) 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 in 3 ways as a sum of consecutive naturals, for example, 40625960 + ... + 40939113.

It is an arithmetic number, because the mean of its divisors is an integer number (3192824039193).

Almost surely, 2^{12771214435121} is an apocalyptic number.

It is an amenable number.

12771214435121 is a deficient number, since it is larger than the sum of its proper divisors (81721651).

12771214435121 is an equidigital number, since it uses as much as digits as its factorization.

12771214435121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81721650.

The product of its digits is 94080, while the sum is 41.

The spelling of 12771214435121 in words is "twelve trillion, seven hundred seventy-one billion, two hundred fourteen million, four hundred thirty-five thousand, one hundred twenty-one".