128005236124127 has 2 divisors, whose sum is σ = 128005236124128. Its totient is φ = 128005236124126.

The previous prime is 128005236124109. The next prime is 128005236124189. The reversal of 128005236124127 is 721421632500821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128005236124127 - 2²⁰ = 128005235075551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128005236124027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64002618062063 + 64002618062064.

It is an arithmetic number, because the mean of its divisors is an integer number (64002618062064).

Almost surely, 2^{128005236124127} is an apocalyptic number.

128005236124127 is a deficient number, since it is larger than the sum of its proper divisors (1).

128005236124127 is an equidigital number, since it uses as much as digits as its factorization.

128005236124127 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 44.

Adding to 128005236124127 its reverse (721421632500821), we get a palindrome (849426868624948).

The spelling of 128005236124127 in words is "one hundred twenty-eight trillion, five billion, two hundred thirty-six million, one hundred twenty-four thousand, one hundred twenty-seven".