129013027900 has 72 divisors (see below), whose sum is σ = 293691515040. Its totient is φ = 49123872000.

The previous prime is 129013027883. The next prime is 129013027903. The reversal of 129013027900 is 9720310921.

It is a happy number.

It is a super-2 number, since 2×129013027900² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129013027903) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 107391 + ... + 519190.

It is an arithmetic number, because the mean of its divisors is an integer number (4079048820).

Almost surely, 2^129013027900 is an apocalyptic number.

129013027900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129013027900 is an abundant number, since it is smaller than the sum of its proper divisors (164678487140).

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

129013027900 is a wasteful number, since it uses less digits than its factorization.

129013027900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626695 (or 626688 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 34.

The spelling of 129013027900 in words is "one hundred twenty-nine billion, thirteen million, twenty-seven thousand, nine hundred".