129200211 has 40 divisors (see below), whose sum is σ = 223407760. Its totient is φ = 73791648.

The previous prime is 129200173. The next prime is 129200243. The reversal of 129200211 is 112002921.

It is not a de Polignac number, because 129200211 - 2⁹ = 129199699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129200261) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 63831 + ... + 65823.

It is an arithmetic number, because the mean of its divisors is an integer number (5585194).

Almost surely, 2^129200211 is an apocalyptic number.

129200211 is a deficient number, since it is larger than the sum of its proper divisors (94207549).

129200211 is an frugal number, since it uses more digits than its factorization.

129200211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2030 (or 2003 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 129200211 is about 11366.6270722673. The cubic root of 129200211 is about 505.5387003804.

The spelling of 129200211 in words is "one hundred twenty-nine million, two hundred thousand, two hundred eleven".