Numbers 1110-1119

A page of the Numeropedia - the Special Encyclopedia of Numbers

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1,111

[Math.] 1,111 = 11×101.

 

[Math.]

1×9+2 = 11          

12×9+3 = 111      

123×9+4 = 1,111

1234×9+5 = 11,111

12,345×9+6 = 111,111

123,456×9+7 = 1,111,111

1,234,567×9+8 = 11,111,111

12,345,678×9+9 = 111,111,111 

123,456,789×9+10 = 1,111,111,111

1,234,567,900×9+11 = 11,111,111,111

...

 

1,111 

[Math.]

1×1 = 1

11×11 = 121

111×111 = 12321

1111×1111 = 1234321

11111×11111 = 123454321

111111×111111 = 12345654321

1111111×1111111 = 1234567654321

11111111×11111111 = 123456787654321

111111111×111111111 = 12345678987654321

1111111111×1111111111 = 1234567900987654321. 

 

[Math.]  1111 = 112+122+132+142+152+162.

 

[Math.]  

The 11th triangle number is

66

The 1111th triangle number is

617,716

The 111,111th triangle number is

6,172,882,716

The 11,111,111th triangle number is

61,728,399,382,716

All numbers are palindromic.

 

[Math.]   Numbers of the same pattern, xxy, where y = x +1:  1122 = 012,544 & 012+544 = 556 & 5562 = 309,136 & 309+136 = 445 & 4452 = 198,025 & 198+025 = 223 & 2232 = 049,729 & 049+729 = 778 & 7782 = 605,284 & 605+284 = 889 & 8892 = 790,321 & 790+321 = 1111. Also: 3342 = 111556 & 111+556 = 667.

 

[Zip]  U.S. Postal Zip Code: Springfield, Massachusetts 01111.

 

1,112

[Math.]  11122 = 1,236,544 and reversely, 4,456,321 = 21112. 

 

1,114

[Math.]  1114 = 12+23+34+45 = 01+12+23+34+45.

 

1,117

[Math.]  A prime number.

 

1,118

[Tech.] The longer side (mm, millimeters) of the U.S. standard paper of size E, for technical drawing, 1118 mm×864 mm. It is double of size D, 864 mm×559 mm.

 

1,120-1,149 (separate page)

 

1,150-1,179 (separate page)       

              

1,180-1,199 (separate page)