129122702871 has 8 divisors (see below), whose sum is σ = 172456900224. Its totient is φ = 85935153720.

The previous prime is 129122702867. The next prime is 129122702879. The reversal of 129122702871 is 178207221921.

It is a happy number.

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

It is not a de Polignac number, because 129122702871 - 2² = 129122702867 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129122702879) 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, 36659995 + ... + 36663516.

It is an arithmetic number, because the mean of its divisors is an integer number (21557112528).

Almost surely, 2^129122702871 is an apocalyptic number.

129122702871 is a deficient number, since it is larger than the sum of its proper divisors (43334197353).

129122702871 is an equidigital number, since it uses as much as digits as its factorization.

129122702871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73324101.

The product of its (nonzero) digits is 56448, while the sum is 42.

The spelling of 129122702871 in words is "one hundred twenty-nine billion, one hundred twenty-two million, seven hundred two thousand, eight hundred seventy-one".