Main Page | See live article | Alphabetical index This article is about the number. For the year AD 101, see 101. One hundred one (also One hundred and one) (101, CI) is the natural number following one hundred and preceding one hundred two. It is the 26th prime number and a palindromic number (therefore also a palindromic prime). The next prime is one hundred three, with which it comprises a twin prime. One hundred one is the sum of five consecutive primes (13 + 17 + 19 + 23 + 29) 101 is also: The atomic number of mendelevium, an actinide. The designation of US Highway 101, which runs from California to Washington. In universities, sometimes the course number of basic or entry-level courses. Also used in titles of books to indicate the book is meant for a beginner. At universities with four-digit course numbers, the equivalent course number is 1001 or 1010. In the title of the movie 101 Dalmatians, starring Glenn Close. A .com URL that redirects to the Disney.go.com website This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.