Factors of 121

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What are the factors of 121?

Answer

Factors of 121:

1, 11, 121

3 factors · 121 = 11² · composite

Underlined — prime: 11 · 1 — neither prime nor composite · others — composite

Factor pairs of 121

2 pairs: 1 × 121 · 11 × 11

11 × 11 is a pair of one factor — that is why 121 has an odd number of factors, 3.

121 = 11² → (2 + 1) = 3 factors: add 1 to each exponent and multiply.

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See Also

Prime Number Checker - Find out whether a given number is Prime or not
Prime Factorization - Prime Factorization Calculator
Prime Numbers List - List of all Prime Numbers - how many Prime numbers are between

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Factors Table

Number	Factors
106	1, 2, 53, 106
107	1, 107
108	1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 108
109	1, 109
110	1, 2, 5, 10, 11, 22, 55, 110
111	1, 3, 37, 111
112	1, 2, 4, 7, 8, 14, 16, 28, 56, 112
113	1, 113
114	1, 2, 3, 6, 19, 38, 57, 114
115	1, 5, 23, 115
116	1, 2, 4, 29, 58, 116
117	1, 3, 9, 13, 39, 117
118	1, 2, 59, 118
119	1, 7, 17, 119
120	1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120
121	1, 11, 121
122	1, 2, 61, 122
123	1, 3, 41, 123
124	1, 2, 4, 31, 62, 124
125	1, 5, 25, 125
126	1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126
127	1, 127
128	1, 2, 4, 8, 16, 32, 64, 128
129	1, 3, 43, 129
130	1, 2, 5, 10, 13, 26, 65, 130
131	1, 131
132	1, 2, 3, 4, 6, 11, 12, 22, 33, 44, 66, 132
133	1, 7, 19, 133
134	1, 2, 67, 134
135	1, 3, 5, 9, 15, 27, 45, 135

FAQ

What are the factors of 121?

Factors of 121: 1, 11, 121

How many factors does 121 have?

Number 121 has 3 factors

How many factor pairs does 121 have?

Number 121 has 2 factor pairs

Is 121 a prime or composite number?

Composite: 121 = 11², so it has 3 factors — a prime has exactly two.

How many factors does 121 have excluding 1 and 121?

1: 11.

Why does 121 have an odd number of factors?

121 is a perfect square: in the pair 11 × 11 the factor 11 pairs with itself, so the 3 factors are 1 pair plus 11.