2001220101211 has 8 divisors (see below), whose sum is σ = 2170620368784. Its totient is φ = 1837562215680.

The previous prime is 2001220101151. The next prime is 2001220101217. The reversal of 2001220101211 is 1121010221002.

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

It is not a de Polignac number, because 2001220101211 - 2¹¹ = 2001220099163 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001220101191 and 2001220101200.

It is not an unprimeable number, because it can be changed into a prime (2001220101217) 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, 1435594785 + ... + 1435596178.

It is an arithmetic number, because the mean of its divisors is an integer number (271327546098).

Almost surely, 2^{2001220101211} is an apocalyptic number.

2001220101211 is a deficient number, since it is larger than the sum of its proper divisors (169400267573).

2001220101211 is a wasteful number, since it uses less digits than its factorization.

2001220101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871191021.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2001220101211 its reverse (1121010221002), we get a palindrome (3122230322213).

The spelling of 2001220101211 in words is "two trillion, one billion, two hundred twenty million, one hundred one thousand, two hundred eleven".