What is 111111111?
111,111,111 (one hundred eleven million one hundred eleven thousand one hundred eleven) is an odd nine-digits composite number following 111111110 and preceding 111111112. The sum of its digits is 9.
Why does 111111111 squared?
Because 111111111 times 111111111 equals 12345678987654321 according to the laws of multiplication for real numbers.
How large is a googol?
10100
A googol is the large number 10100. In decimal notation, it is written as the digit 1 followed by one hundred zeroes: 10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000.
What times what equals 12345678987654321?
Why is 111111111×111111111=12345678987654321 It is quite amazing how the number ascend and then descend by ones.