2001220211209 has 8 divisors (see below), whose sum is σ = 2010253291200. Its totient is φ = 1992189036336.

The previous prime is 2001220211171. The next prime is 2001220211227. The reversal of 2001220211209 is 9021120221002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2001220211209 - 2²³ = 2001211822601 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2001220211209.

It is not an unprimeable number, because it can be changed into a prime (2001220211299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1650732 + ... + 2593714.

It is an arithmetic number, because the mean of its divisors is an integer number (251281661400).

Almost surely, 2^{2001220211209} is an apocalyptic number.

It is an amenable number.

2001220211209 is a deficient number, since it is larger than the sum of its proper divisors (9033079991).

2001220211209 is an equidigital number, since it uses as much as digits as its factorization.

2001220211209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952559.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 2001220211209 in words is "two trillion, one billion, two hundred twenty million, two hundred eleven thousand, two hundred nine".