2001220211211 has 16 divisors (see below), whose sum is σ = 2873660647200. Its totient is φ = 1231471411200.

The previous prime is 2001220211171. The next prime is 2001220211227. The reversal of 2001220211211 is 1121120221002.

It is not a de Polignac number, because 2001220211211 - 2⁹ = 2001220210699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001220211261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3736 + ... + 2000613.

It is an arithmetic number, because the mean of its divisors is an integer number (179603790450).

Almost surely, 2^{2001220211211} is an apocalyptic number.

2001220211211 is a deficient number, since it is larger than the sum of its proper divisors (872440435989).

2001220211211 is a wasteful number, since it uses less digits than its factorization.

2001220211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2029966.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2001220211211 its reverse (1121120221002), we get a palindrome (3122340432213).

The spelling of 2001220211211 in words is "two trillion, one billion, two hundred twenty million, two hundred eleven thousand, two hundred eleven".