Is 121 a deficient number and what is its deficiency?

Is 121 a deficient number?

Here we will explain and calculate if 121 is a deficient number and its deficiency if applicable.

121 is a deficient number if the sum of its proper divisors is less than 121.

The sum of its proper divisors is calculated as follows: 1 + 11 = 12.

12 is less than 121. Therefore, 121 is a deficient number.

The deficiency of 121 is 121 minus the sum of its proper divisors. Thus, the deficiency of 121 is 121 - 12 = 109

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