12731271269 has 2 divisors, whose sum is σ = 12731271270. Its totient is φ = 12731271268.

The previous prime is 12731271257. The next prime is 12731271277. The reversal of 12731271269 is 96217213721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10093216225 + 2638055044 = 100465^2 + 51362^2 .

It is a cyclic number.

It is not a de Polignac number, because 12731271269 - 2⁸ = 12731271013 is a prime.

It is a super-2 number, since 2×12731271269² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12731271229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6365635634 + 6365635635.

It is an arithmetic number, because the mean of its divisors is an integer number (6365635635).

Almost surely, 2^12731271269 is an apocalyptic number.

It is an amenable number.

12731271269 is a deficient number, since it is larger than the sum of its proper divisors (1).

12731271269 is an equidigital number, since it uses as much as digits as its factorization.

12731271269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 41.

The spelling of 12731271269 in words is "twelve billion, seven hundred thirty-one million, two hundred seventy-one thousand, two hundred sixty-nine".