2001201021011 has 6 divisors (see below), whose sum is σ = 2072587503012. Its totient is φ = 1932194088440.

The previous prime is 2001201020999. The next prime is 2001201021019. The reversal of 2001201021011 is 1101201021002.

It is not a de Polignac number, because 2001201021011 - 2³⁰ = 2000127279187 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001201020983 and 2001201021001.

It is not an unprimeable number, because it can be changed into a prime (2001201021019) 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 5 ways as a sum of consecutive naturals, for example, 1189773845 + ... + 1189775526.

It is an arithmetic number, because the mean of its divisors is an integer number (345431250502).

Almost surely, 2^{2001201021011} is an apocalyptic number.

2001201021011 is a deficient number, since it is larger than the sum of its proper divisors (71386482001).

2001201021011 is an equidigital number, since it uses as much as digits as its factorization.

2001201021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2379549429 (or 2379549400 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2001201021011 its reverse (1101201021002), we get a palindrome (3102402042013).

Subtracting from 2001201021011 its reverse (1101201021002), we obtain a palindrome (900000000009).

The spelling of 2001201021011 in words is "two trillion, one billion, two hundred one million, twenty-one thousand, eleven".