2003221209 has 16 divisors (see below), whose sum is σ = 3007770624. Its totient is φ = 1174909200.

The previous prime is 2003221189. The next prime is 2003221229. The reversal of 2003221209 is 9021223002.

It is an interprime number because it is at equal distance from previous prime (2003221189) and next prime (2003221229).

It is not a de Polignac number, because 2003221209 - 2⁹ = 2003220697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2003221229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 978069 + ... + 980114.

It is an arithmetic number, because the mean of its divisors is an integer number (187985664).

Almost surely, 2^2003221209 is an apocalyptic number.

It is an amenable number.

2003221209 is a deficient number, since it is larger than the sum of its proper divisors (1004549415).

2003221209 is a wasteful number, since it uses less digits than its factorization.

2003221209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958228.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 2003221209 is about 44757.3592719678. The cubic root of 2003221209 is about 1260.5970985799.

The spelling of 2003221209 in words is "two billion, three million, two hundred twenty-one thousand, two hundred nine".