129124886420 has 24 divisors (see below), whose sum is σ = 271296121824. Its totient is φ = 51624457376.

The previous prime is 129124886399. The next prime is 129124886447. The reversal of 129124886420 is 24688421921.

It is a happy number.

129124886420 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1552022 + ... + 1633101.

It is an arithmetic number, because the mean of its divisors is an integer number (11304005076).

Almost surely, 2^129124886420 is an apocalyptic number.

129124886420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129124886420 is an abundant number, since it is smaller than the sum of its proper divisors (142171235404).

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

129124886420 is a wasteful number, since it uses less digits than its factorization.

129124886420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3187159 (or 3187157 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 47.

The spelling of 129124886420 in words is "one hundred twenty-nine billion, one hundred twenty-four million, eight hundred eighty-six thousand, four hundred twenty".