7121

7121 is a natural number that sits between 7120 and 7122. In mathematics, 7121 is a prime number, meaning it has no positive divisors other than 1 and itself.

The decimal representation of 7121 is 7-1-2-1. The sum of its digits is 11, which shows it is not divisible by 3. It is an odd, four-digit number. Its reverse is 1217, so it is not a palindrome. As a prime, its only positive divisors are 1 and 7121.

Beyond its primality, 7121 does not have widely recognized special properties in standard number theory. It is not a well-known constant or a prominent term in famous mathematical sequences or puzzles.

In practical usage, 7121 may be employed as an identifier in catalogs, model numbers, or geographic designations such as postal or area codes, street or building numbers, or product codes. As with many four-digit numbers, its meaning is context-dependent and varies by domain.