2001021100011 has 8 divisors (see below), whose sum is σ = 2964475703760. Its totient is φ = 1334014066656.

The previous prime is 2001021100009. The next prime is 2001021100021. The reversal of 2001021100011 is 1100011201002.

It is a happy number.

It is not a de Polignac number, because 2001021100011 - 2¹ = 2001021100009 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 = 2001021099966 and 2001021100002.

It is not an unprimeable number, because it can be changed into a prime (2001021100021) 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, 37055946270 + ... + 37055946323.

It is an arithmetic number, because the mean of its divisors is an integer number (370559462970).

Almost surely, 2^{2001021100011} is an apocalyptic number.

2001021100011 is a deficient number, since it is larger than the sum of its proper divisors (963454603749).

2001021100011 is an equidigital number, since it uses as much as digits as its factorization.

2001021100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74111892602 (or 74111892596 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 2001021100011 its reverse (1100011201002), we get a palindrome (3101032301013).

The spelling of 2001021100011 in words is "two trillion, one billion, twenty-one million, one hundred thousand, eleven".