129297192218 has 32 divisors (see below), whose sum is σ = 196613391744. Its totient is φ = 63765329472.

The previous prime is 129297192217. The next prime is 129297192253. The reversal of 129297192218 is 812291792921.

It is a self number, because there is not a number n which added to its sum of digits gives 129297192218.

It is not an unprimeable number, because it can be changed into a prime (129297192217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70002971 + ... + 70004817.

It is an arithmetic number, because the mean of its divisors is an integer number (6144168492).

Almost surely, 2^129297192218 is an apocalyptic number.

129297192218 is a deficient number, since it is larger than the sum of its proper divisors (67316199526).

129297192218 is a wasteful number, since it uses less digits than its factorization.

129297192218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3206.

The product of its digits is 653184, while the sum is 53.

The spelling of 129297192218 in words is "one hundred twenty-nine billion, two hundred ninety-seven million, one hundred ninety-two thousand, two hundred eighteen".