2001122211011 has 12 divisors (see below), whose sum is σ = 2513806414896. Its totient is φ = 1559316007920.

The previous prime is 2001122211001. The next prime is 2001122211019. The reversal of 2001122211011 is 1101122211002.

It is not a de Polignac number, because 2001122211011 - 2²² = 2001118016707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001122211019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1181299160 + ... + 1181300853.

It is an arithmetic number, because the mean of its divisors is an integer number (209483867908).

Almost surely, 2^{2001122211011} is an apocalyptic number.

2001122211011 is a deficient number, since it is larger than the sum of its proper divisors (512684203885).

2001122211011 is a wasteful number, since it uses less digits than its factorization.

2001122211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362600042 (or 2362600031 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2001122211011 its reverse (1101122211002), we get a palindrome (3102244422013).

Subtracting from 2001122211011 its reverse (1101122211002), we obtain a palindrome (900000000009).

The spelling of 2001122211011 in words is "two trillion, one billion, one hundred twenty-two million, two hundred eleven thousand, eleven".