Q:
# Is the number 121 a prime number?

**The number 121 is not a prime number.** A prime number must have only two factors, 1 and the number itself. However, the number 121 has three factors as 11 is a also factor of 121 in addition to 1 and 121 itself.

A prime number is not divisible by any other number other than the number 1 and itself. To find out if a number is prime number its factors are obtained. The factors of 121 are 1, 11 and 121. Similarly, the factors of 43 are 1 and 43 only. This makes 43 a prime number. However, the number 50 has 1, 2, 5, 10 and 50 as its factors. Thus 50 is not a prime number but a composite number.

Learn more about Numbers-
Q:
## What number is "IV"?

A: The Roman numeral "IV" represents the number four. Roman numerals were developed by the Romans to indicate numbers in trade and commerce. This numeral syst... Full Answer >Filed Under: -
Q:
## What is a number model in math?

A: A number model in math is a sentence that illustrates how the parts of a number story are related. The equation may include addition, subtraction, division... Full Answer >Filed Under: -
Q:
## Where can you find a product's serial number?

A: The location to find the manufacturer's serial number, a unique code assigned for identification of a single unit, can vary by brand and product. The manuf... Full Answer >Filed Under: -
Q:
## Is "111" a prime number?

A: The number 111 is not a prime number. For a number to be considered a prime number, it cannot be divided by more than just itself and the number one. The n... Full Answer >Filed Under: