129210500016 has 120 divisors (see below), whose sum is σ = 412333608960. Its totient is φ = 37418416128.

The previous prime is 129210500009. The next prime is 129210500047. The reversal of 129210500016 is 610005012921.

129210500016 is a `hidden beast` number, since 129 + 21 + 0 + 500 + 0 + 16 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1998256 + ... + 2061903.

It is an arithmetic number, because the mean of its divisors is an integer number (3436113408).

Almost surely, 2^129210500016 is an apocalyptic number.

129210500016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129210500016 is an abundant number, since it is smaller than the sum of its proper divisors (283123108944).

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

129210500016 is a wasteful number, since it uses less digits than its factorization.

129210500016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4060203 (or 4060194 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

Adding to 129210500016 its reverse (610005012921), we get a palindrome (739215512937).

The spelling of 129210500016 in words is "one hundred twenty-nine billion, two hundred ten million, five hundred thousand, sixteen".