201002109 has 32 divisors (see below), whose sum is σ = 344924160. Its totient is φ = 101044800.

The previous prime is 201002063. The next prime is 201002111. The reversal of 201002109 is 901200102.

It is a happy number.

It is not a de Polignac number, because 201002109 - 2⁹ = 201001597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201002189) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6874 + ... + 21195.

It is an arithmetic number, because the mean of its divisors is an integer number (10778880).

Almost surely, 2^201002109 is an apocalyptic number.

It is an amenable number.

201002109 is a deficient number, since it is larger than the sum of its proper divisors (143922051).

201002109 is a wasteful number, since it uses less digits than its factorization.

201002109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28121.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 201002109 is about 14177.5212572579. The cubic root of 201002109 is about 585.7786490188.

The spelling of 201002109 in words is "two hundred one million, two thousand, one hundred nine".