210020129 has 16 divisors (see below), whose sum is σ = 244097280. Its totient is φ = 178684560.

The previous prime is 210020101. The next prime is 210020137. The reversal of 210020129 is 921020012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210020129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210020189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11294 + ... + 23400.

It is an arithmetic number, because the mean of its divisors is an integer number (15256080).

Almost surely, 2^210020129 is an apocalyptic number.

It is an amenable number.

210020129 is a deficient number, since it is larger than the sum of its proper divisors (34077151).

210020129 is a wasteful number, since it uses less digits than its factorization.

210020129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12220.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 210020129 is about 14492.0712460297. The cubic root of 210020129 is about 594.4111859719.

The spelling of 210020129 in words is "two hundred ten million, twenty thousand, one hundred twenty-nine".