129612020050 has 24 divisors (see below), whose sum is σ = 242038852272. Its totient is φ = 51638250000.

The previous prime is 129612020017. The next prime is 129612020071. The reversal of 129612020050 is 50020216921.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5151276 + ... + 5176375.

It is an arithmetic number, because the mean of its divisors is an integer number (10084952178).

Almost surely, 2^129612020050 is an apocalyptic number.

129612020050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129612020050 is a deficient number, since it is larger than the sum of its proper divisors (112426832222).

129612020050 is a wasteful number, since it uses less digits than its factorization.

129612020050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10327914 (or 10327909 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

Adding to 129612020050 its reverse (50020216921), we get a palindrome (179632236971).

The spelling of 129612020050 in words is "one hundred twenty-nine billion, six hundred twelve million, twenty thousand, fifty".