2021002209 has 24 divisors (see below), whose sum is σ = 2984217600. Its totient is φ = 1317394368.

The previous prime is 2021002187. The next prime is 2021002213. The reversal of 2021002209 is 9022001202.

2021002209 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2021002209 - 2¹² = 2020998113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021002191 and 2021002200.

It is not an unprimeable number, because it can be changed into a prime (2021002219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 661317 + ... + 664365.

It is an arithmetic number, because the mean of its divisors is an integer number (124342400).

Almost surely, 2^2021002209 is an apocalyptic number.

It is an amenable number.

2021002209 is a deficient number, since it is larger than the sum of its proper divisors (963215391).

2021002209 is a wasteful number, since it uses less digits than its factorization.

2021002209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4669 (or 4666 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2021002209 is about 44955.5581546932. The cubic root of 2021002209 is about 1264.3158895850.

The spelling of 2021002209 in words is "two billion, twenty-one million, two thousand, two hundred nine".