10
As of October 2011, the record was ten trillion digits.
Pi was calculated to 10 trillion digits on October 17, 2011.
The largest digits number with only 2 digits alike is 99
As of October 2015, the largest known prime number is 2^57,885,161 − 1, a number with 17,425,170 digits.
10 digits
You could be 22? 2 + 2 = 4 2 x 2 = 4
The number is 13 digits in length. The first 2 digits = the month of birth; the next 3 digits are randomly assigned; the next 4 digits = the year of birth; the next 2 digits = "41" (it was the 41st state); and the last 2 digits = day of birth.
Not 2 numbers - 2 digits. The digits 0 and 1.
1 + 1 = 2 The sum of the digits is therefore 2.
2711 rounded to 2 significant digits is 2700
009999991 rounded to 2 significant digits is 1.0e7
The sum of the digits in 252 is 2 + 5 + 2 which equals 9.