129105342122347 has 4 divisors (see below), whose sum is σ = 129105886939960. Its totient is φ = 129104797304736.

The previous prime is 129105342122291. The next prime is 129105342122381. The reversal of 129105342122347 is 743221243501921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129105342122347 - 2⁷ = 129105342122219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129105342122297 and 129105342122306.

It is not an unprimeable number, because it can be changed into a prime (129105342122947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272053197 + ... + 272527342.

It is an arithmetic number, because the mean of its divisors is an integer number (32276471734990).

Almost surely, 2^{129105342122347} is an apocalyptic number.

129105342122347 is a deficient number, since it is larger than the sum of its proper divisors (544817613).

129105342122347 is an equidigital number, since it uses as much as digits as its factorization.

129105342122347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544817612.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 129105342122347 in words is "one hundred twenty-nine trillion, one hundred five billion, three hundred forty-two million, one hundred twenty-two thousand, three hundred forty-seven".