12127085543 has 4 divisors (see below), whose sum is σ = 12127346208. Its totient is φ = 12126824880.

The previous prime is 12127085489. The next prime is 12127085567. The reversal of 12127085543 is 34558072121.

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 12127085543 - 2⁸ = 12127085287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12127085497 and 12127085506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12127085743) 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, 39398 + ... + 160643.

It is an arithmetic number, because the mean of its divisors is an integer number (3031836552).

Almost surely, 2^12127085543 is an apocalyptic number.

12127085543 is a deficient number, since it is larger than the sum of its proper divisors (260665).

12127085543 is an equidigital number, since it uses as much as digits as its factorization.

12127085543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260664.

The product of its (nonzero) digits is 67200, while the sum is 38.

The spelling of 12127085543 in words is "twelve billion, one hundred twenty-seven million, eighty-five thousand, five hundred forty-three".