# 121

## 121 is an odd composite number. It is composed of a single prime number multiplied by itself.

What does the number 121 look like?

This visualization shows the relationship between its 1 prime factors (large circles) and 3 divisors.

121 is an odd composite number. It has a total of three divisors.

## Prime factorization of 121:

### 112

(11 × 11)

See below for interesting mathematical facts about the number 121 from the Numbermatics database.

### Names of 121

• Cardinal: 121 can be written as One hundred twenty-one.

### Scientific notation

• Scientific notation: 1.21 × 102

### Factors of 121

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 11

### Divisors of 121

• Number of divisors d(n): 3
• Complete list of divisors:
• Sum of all divisors σ(n): 133
• Sum of proper divisors (its aliquot sum) s(n): 12
• 121 is a deficient number, because the sum of its proper divisors (12) is less than itself. Its deficiency is 109

### Bases of 121

• Binary: 11110012
• Base-36: 3D

### Squares and roots of 121

• 121 squared (1212) is 14641
• 121 cubed (1213) is 1771561
• 121 is a perfect square number. Its square root is 11
• The cube root of 121 is 4.9460874433

### Scales and comparisons

How big is 121?
• 121 seconds is equal to 2 minutes, 1 second.
• To count from 1 to 121 would take you about .

This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 121 cubic inches would be around 0.4 feet tall.

### Recreational maths with 121

• 121 is the same when its digits are reversed! That makes it a palindromic number.
• The number of decimal digits it has is: 3
• The sum of 121's digits is 4
• More coming soon!