129440042991223 has 2 divisors, whose sum is σ = 129440042991224. Its totient is φ = 129440042991222.

The previous prime is 129440042991199. The next prime is 129440042991227. The reversal of 129440042991223 is 322199240044921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129440042991223 - 2⁹ = 129440042990711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129440042991227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64720021495611 + 64720021495612.

It is an arithmetic number, because the mean of its divisors is an integer number (64720021495612).

Almost surely, 2^{129440042991223} is an apocalyptic number.

129440042991223 is a deficient number, since it is larger than the sum of its proper divisors (1).

129440042991223 is an equidigital number, since it uses as much as digits as its factorization.

129440042991223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2239488, while the sum is 52.

The spelling of 129440042991223 in words is "one hundred twenty-nine trillion, four hundred forty billion, forty-two million, nine hundred ninety-one thousand, two hundred twenty-three".