11881

11881 is a number that falls between 11880 and 11882 in the sequence of natural numbers. It is an odd number, as it cannot be evenly divided by 2. In the decimal system, it is written as "eleven thousand, eight hundred eighty-one." In scientific notation, it is expressed as 1.1881 x 10^4.

The number 11881 has a digital root of 2, which is calculated by repeatedly summing the digits of the number until a single-digit number is obtained. This process involves adding 1 + 1 + 8 + 8 + 1, which equals 19, and then adding 1 + 9 to get 10, and finally 1 + 0 to get 1.

In mathematics, 11881 is a composite number, meaning it has factors other than 1 and itself. Its prime factorization is 11 x 1081. The number 11881 is also a square number, as it can be expressed as 109^2, where 109 is an integer.

In the context of the International Telecommunication Union (ITU) country calling codes, 11881 is not assigned to any country. However, it is used as a test number for international telephone calls, as it is not assigned to any specific country or region.