The best number is 73
73is the21stprime number- Its mirror,
37, is the12th - and its mirror,
21, is the product ofmultiplying 7 and 3 - and in binary,
73is a palindrome,1001001, which backwards is1001001.”
73 is the 21st prime number37, is the 12th21, is the product of multiplying 7 and 373 is a palindrome, 1001001, which backwards is 1001001.”