129129367228 has 12 divisors (see below), whose sum is σ = 225978956280. Its totient is φ = 64563951152.

The previous prime is 129129367123. The next prime is 129129367249. The reversal of 129129367228 is 822763921921.

It is a happy number.

129129367228 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 481863 + ... + 700321.

It is an arithmetic number, because the mean of its divisors is an integer number (18831579690).

Almost surely, 2^129129367228 is an apocalyptic number.

It is an amenable number.

129129367228 is a deficient number, since it is larger than the sum of its proper divisors (96849589052).

129129367228 is a wasteful number, since it uses less digits than its factorization.

129129367228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366236 (or 366234 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 52.

The spelling of 129129367228 in words is "one hundred twenty-nine billion, one hundred twenty-nine million, three hundred sixty-seven thousand, two hundred twenty-eight".