2001220011 has 48 divisors (see below), whose sum is σ = 3487910400. Its totient is φ = 1080117504.

The previous prime is 2001220007. The next prime is 2001220019. The reversal of 2001220011 is 1100221002.

2001220011 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2001220011 - 2² = 2001220007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2001219975 and 2001220002.

It is not an unprimeable number, because it can be changed into a prime (2001220019) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 427395 + ... + 432051.

It is an arithmetic number, because the mean of its divisors is an integer number (72664800).

Almost surely, 2^2001220011 is an apocalyptic number.

2001220011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2001220011 is a deficient number, since it is larger than the sum of its proper divisors (1486690389).

2001220011 is a wasteful number, since it uses less digits than its factorization.

2001220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5048 (or 5045 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2001220011 is about 44734.9976081367. The cubic root of 2001220011 is about 1260.1771840775.

Adding to 2001220011 its reverse (1100221002), we get a palindrome (3101441013).

Subtracting from 2001220011 its reverse (1100221002), we obtain a palindrome (900999009).

The spelling of 2001220011 in words is "two billion, one million, two hundred twenty thousand, eleven".