129332120520 has 64 divisors (see below), whose sum is σ = 391429998720. Its totient is φ = 34183353344.

The previous prime is 129332120513. The next prime is 129332120531. The reversal of 129332120520 is 25021233921.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 4755324 + ... + 4782443.

It is an arithmetic number, because the mean of its divisors is an integer number (6116093730).

Almost surely, 2^129332120520 is an apocalyptic number.

129332120520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129332120520 is an abundant number, since it is smaller than the sum of its proper divisors (262097878200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129332120520 is a wasteful number, since it uses less digits than its factorization.

129332120520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9537894 (or 9537890 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The spelling of 129332120520 in words is "one hundred twenty-nine billion, three hundred thirty-two million, one hundred twenty thousand, five hundred twenty".