201000209999 has 4 divisors (see below), whose sum is σ = 211579168440. Its totient is φ = 190421251560.

The previous prime is 201000209981. The next prime is 201000210007. The reversal of 201000209999 is 999902000102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201000209999 - 2¹⁶ = 201000144463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201000209099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5289479192 + ... + 5289479229.

It is an arithmetic number, because the mean of its divisors is an integer number (52894792110).

Almost surely, 2^201000209999 is an apocalyptic number.

201000209999 is a deficient number, since it is larger than the sum of its proper divisors (10578958441).

201000209999 is a wasteful number, since it uses less digits than its factorization.

201000209999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10578958440.

The product of its (nonzero) digits is 26244, while the sum is 41.

The spelling of 201000209999 in words is "two hundred one billion, two hundred nine thousand, nine hundred ninety-nine".