2102001002209 has 4 divisors (see below), whose sum is σ = 2225648120004. Its totient is φ = 1978353884416.

The previous prime is 2102001002177. The next prime is 2102001002237. The reversal of 2102001002209 is 9022001002012.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1939836128400 + 162164873809 = 1392780^2 + 402697^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102001002209 - 2⁵ = 2102001002177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2102001002239) 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, 61823558872 + ... + 61823558905.

It is an arithmetic number, because the mean of its divisors is an integer number (556412030001).

Almost surely, 2^{2102001002209} is an apocalyptic number.

It is an amenable number.

2102001002209 is a deficient number, since it is larger than the sum of its proper divisors (123647117795).

2102001002209 is a wasteful number, since it uses less digits than its factorization.

2102001002209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123647117794.

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 2102001002209 in words is "two trillion, one hundred two billion, one million, two thousand, two hundred nine".