12005136427 has 2 divisors, whose sum is σ = 12005136428. Its totient is φ = 12005136426.

The previous prime is 12005136413. The next prime is 12005136457. The reversal of 12005136427 is 72463150021.

It is a weak prime.

It is an emirp because it is prime and its reverse (72463150021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12005136427 is a prime.

It is not a weakly prime, because it can be changed into another prime (12005136457) 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 as a sum of consecutive naturals, namely, 6002568213 + 6002568214.

It is an arithmetic number, because the mean of its divisors is an integer number (6002568214).

Almost surely, 2^12005136427 is an apocalyptic number.

12005136427 is a deficient number, since it is larger than the sum of its proper divisors (1).

12005136427 is an equidigital number, since it uses as much as digits as its factorization.

12005136427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

Adding to 12005136427 its reverse (72463150021), we get a palindrome (84468286448).

The spelling of 12005136427 in words is "twelve billion, five million, one hundred thirty-six thousand, four hundred twenty-seven".