129139807100 has 36 divisors (see below), whose sum is σ = 280541190048. Its totient is φ = 51599184000.

The previous prime is 129139807081. The next prime is 129139807103. The reversal of 129139807100 is 1708931921.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129139807103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 617681 + ... + 799880.

Almost surely, 2^129139807100 is an apocalyptic number.

129139807100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129139807100 is an abundant number, since it is smaller than the sum of its proper divisors (151401382948).

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

129139807100 is a wasteful number, since it uses less digits than its factorization.

129139807100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418486 (or 1418479 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 41.

The spelling of 129139807100 in words is "one hundred twenty-nine billion, one hundred thirty-nine million, eight hundred seven thousand, one hundred".