129111343729 has 8 divisors (see below), whose sum is σ = 133575480360. Its totient is φ = 124648008576.

The previous prime is 129111343693. The next prime is 129111343763. The reversal of 129111343729 is 927343111921.

It can be written as a sum of positive squares in 4 ways, for example, as 17052442225 + 112058901504 = 130585^2 + 334752^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129111343729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129111343129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137037 + ... + 526309.

It is an arithmetic number, because the mean of its divisors is an integer number (16696935045).

Almost surely, 2^129111343729 is an apocalyptic number.

It is an amenable number.

129111343729 is a deficient number, since it is larger than the sum of its proper divisors (4464136631).

129111343729 is a wasteful number, since it uses less digits than its factorization.

129111343729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400739.

The product of its digits is 81648, while the sum is 43.

The spelling of 129111343729 in words is "one hundred twenty-nine billion, one hundred eleven million, three hundred forty-three thousand, seven hundred twenty-nine".