Number 101

A page of the Numeropedia - the Special Encyclopedia of Numbers

1  - 10 - 100  - 1000 - 10,000 - 100,000 - 1M - 10M - 100M1B10B - 100B - 1T - 10T - 100T - 1Q - ...

Back to [Numbers 100-109] & [Number 100]

[Calendar]  The first year of the 2nd century.

[Chemistry]  The atomic number of Mendelevium (Md). An element in the Actinide series: Actinium (89) to Lawrencium (103).

[Edu.]  The usual number assigned for the first class in most areas in college curriculum. The first class for beginners in any subject.

[Math.]  The smallest 3-digit prime number. The only (largest known) prime number of the form 10n+1. The only (or largest known) prime number of the form 1010…0101, alternating of digits 0’s and 1’s.

[Math.]  101 = 5!–4!+3!–2!+1!.

[Math.]   101 = 102+12

1001 = 103+013

10001= 1002+012

[Math.]

1012 = 10,201 = (102–01)2

1013 = 1,030,301 = (103–03+01)3

1014 = 104,060,401 = (104–06+04–01)4

1015 = 10,510,100,501 = (105–10+10–05+01)5

1016 = 1,061,520,150,601 = (106–15+20–15+06–01)2

[Math.]  Squares and cubes of 2 numbers using the same digits:

1012 = 10201 and 1102 = 12100.

Also, 1013 = 1,030,301 and 1103 = 1,331,000.

[Math.]  1,010,101 = 101×10001 and  11,111,111 = 11×101×10001.

[Math.]  A base system of multigrade equalities:

1+6+8 = 15 = 2+4+9 and

12+62+82 = 101 = 22+42+92.

Multigrade equalities still hold by adding any integer n to every base term in both sides.  Hence, the base equality always has number 1 appearing in one side.

[Math.]

1,001 = 11×91

1,000,001 = 101×9901

1,000,000,001 = 1001×999,001

1,000,000,000,001 = 10001×99,990,001

1,000,000,000,000,001 = 100001×9,999,900,001

[Math.]  (121+878 = 999 = 101+898)

1212 = 014,641 & 014+641 = 655

8782 = 770,884 & 770+884 = 1654 and 1+654 = 655.

and

1012 = 010,201 & 010+201 = 211

8982 = 806,404 & 806+404 = 1210 and 1+210 = 211.

[Movie]  Name of TV show/series/movie: “101 Dalmatians”.

[Phone]   The emergency telephone numbers dialing within Argentina are 101 and 107.

[Phone]   The emergency telephone numbers dialing within Ecuador are 101 and 131.

[Phone] The emergency telephone number dialing within Palestine.