3821

This number is a prime.

In the English spelled versions of the digits "threE EighT TwO One" each word starting with the second word starts with the same letter as the end of the previous word. Can you find larger primes like this? [Gaydos]

Smallest multidigit lesser of a twin prime pair which is equal to the sum of lesser of twin primes, i.e., 3+5+11+17+29+...+347+419+431 = 3821. [Sariyar]