129120382271 has 2 divisors, whose sum is σ = 129120382272. Its totient is φ = 129120382270.

The previous prime is 129120382247. The next prime is 129120382283. The reversal of 129120382271 is 172283021921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129120382271 - 2²⁶ = 129053273407 is a prime.

It is a super-2 number, since 2×129120382271² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129120382291) 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, 64560191135 + 64560191136.

It is an arithmetic number, because the mean of its divisors is an integer number (64560191136).

Almost surely, 2^129120382271 is an apocalyptic number.

129120382271 is a deficient number, since it is larger than the sum of its proper divisors (1).

129120382271 is an equidigital number, since it uses as much as digits as its factorization.

129120382271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 38.

The spelling of 129120382271 in words is "one hundred twenty-nine billion, one hundred twenty million, three hundred eighty-two thousand, two hundred seventy-one".