129211368 has 64 divisors (see below), whose sum is σ = 379512000. Its totient is φ = 36142080.

The previous prime is 129211367. The next prime is 129211391. The reversal of 129211368 is 863112921.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (129211361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15393 + ... + 22256.

It is an arithmetic number, because the mean of its divisors is an integer number (5929875).

Almost surely, 2^129211368 is an apocalyptic number.

It is an amenable number.

129211368 is an abundant number, since it is smaller than the sum of its proper divisors (250300632).

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

129211368 is a wasteful number, since it uses less digits than its factorization.

129211368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37682 (or 37678 counting only the distinct ones).

The product of its digits is 5184, while the sum is 33.

The square root of 129211368 is about 11367.1178405082. The cubic root of 129211368 is about 505.5532517832.

The spelling of 129211368 in words is "one hundred twenty-nine million, two hundred eleven thousand, three hundred sixty-eight".