12534402271 has 2 divisors, whose sum is σ = 12534402272. Its totient is φ = 12534402270.

The previous prime is 12534402269. The next prime is 12534402319. The reversal of 12534402271 is 17220443521.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12534402271 - 2¹ = 12534402269 is a prime.

It is a super-2 number, since 2×12534402271² (a number of 21 digits) contains 22 as substring.

Together with 12534402269, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12534402241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6267201135 + 6267201136.

It is an arithmetic number, because the mean of its divisors is an integer number (6267201136).

Almost surely, 2^12534402271 is an apocalyptic number.

12534402271 is a deficient number, since it is larger than the sum of its proper divisors (1).

12534402271 is an equidigital number, since it uses as much as digits as its factorization.

12534402271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 31.

Adding to 12534402271 its reverse (17220443521), we get a palindrome (29754845792).

The spelling of 12534402271 in words is "twelve billion, five hundred thirty-four million, four hundred two thousand, two hundred seventy-one".