129111343223 has 2 divisors, whose sum is σ = 129111343224. Its totient is φ = 129111343222.

The previous prime is 129111343219. The next prime is 129111343237. The reversal of 129111343223 is 322343111921.

It is a weak prime.

It is an emirp because it is prime and its reverse (322343111921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129111343223 - 2² = 129111343219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129111343223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129111343423) 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, 64555671611 + 64555671612.

It is an arithmetic number, because the mean of its divisors is an integer number (64555671612).

Almost surely, 2^129111343223 is an apocalyptic number.

129111343223 is a deficient number, since it is larger than the sum of its proper divisors (1).

129111343223 is an equidigital number, since it uses as much as digits as its factorization.

129111343223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The spelling of 129111343223 in words is "one hundred twenty-nine billion, one hundred eleven million, three hundred forty-three thousand, two hundred twenty-three".