12543191371 has 4 divisors (see below), whose sum is σ = 12664970032. Its totient is φ = 12421412712.

The previous prime is 12543191329. The next prime is 12543191483. The reversal of 12543191371 is 17319134521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17319134521 = 13 ⋅1332241117.

It is a cyclic number.

It is not a de Polignac number, because 12543191371 - 2¹³ = 12543183179 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 12543191371.

It is not an unprimeable number, because it can be changed into a prime (12543191071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60889176 + ... + 60889381.

It is an arithmetic number, because the mean of its divisors is an integer number (3166242508).

Almost surely, 2^12543191371 is an apocalyptic number.

12543191371 is a deficient number, since it is larger than the sum of its proper divisors (121778661).

12543191371 is a wasteful number, since it uses less digits than its factorization.

12543191371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121778660.

The product of its digits is 22680, while the sum is 37.

The spelling of 12543191371 in words is "twelve billion, five hundred forty-three million, one hundred ninety-one thousand, three hundred seventy-one".