2001101211 has 6 divisors (see below), whose sum is σ = 2890479540. Its totient is φ = 1334067468.

The previous prime is 2001101209. The next prime is 2001101257. The reversal of 2001101211 is 1121011002.

It is a happy number.

It is not a de Polignac number, because 2001101211 - 2¹ = 2001101209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 222344579 = 2001101211 / (2 + 0 + 0 + 1 + 1 + 0 + 1 + 2 + 1 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 2001101193 and 2001101202.

It is not an unprimeable number, because it can be changed into a prime (2001101911) 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, 111172281 + ... + 111172298.

It is an arithmetic number, because the mean of its divisors is an integer number (481746590).

Almost surely, 2^2001101211 is an apocalyptic number.

2001101211 is a deficient number, since it is larger than the sum of its proper divisors (889378329).

2001101211 is a wasteful number, since it uses less digits than its factorization.

2001101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222344585 (or 222344582 counting only the distinct ones).

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

The square root of 2001101211 is about 44733.6697689783. The cubic root of 2001101211 is about 1260.1522472871.

Adding to 2001101211 its reverse (1121011002), we get a palindrome (3122112213).

The spelling of 2001101211 in words is "two billion, one million, one hundred one thousand, two hundred eleven".