12731271271 has 4 divisors (see below), whose sum is σ = 13401338200. Its totient is φ = 12061204344.

The previous prime is 12731271269. The next prime is 12731271277. The reversal of 12731271271 is 17217213721.

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

It is a cyclic number.

It is not a de Polignac number, because 12731271271 - 2¹ = 12731271269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12731271277) 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, 335033436 + ... + 335033473.

It is an arithmetic number, because the mean of its divisors is an integer number (3350334550).

Almost surely, 2^12731271271 is an apocalyptic number.

12731271271 is a deficient number, since it is larger than the sum of its proper divisors (670066929).

12731271271 is an equidigital number, since it uses as much as digits as its factorization.

12731271271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670066928.

The product of its digits is 8232, while the sum is 34.

Adding to 12731271271 its reverse (17217213721), we get a palindrome (29948484992).

The spelling of 12731271271 in words is "twelve billion, seven hundred thirty-one million, two hundred seventy-one thousand, two hundred seventy-one".