121332220109 has 2 divisors, whose sum is σ = 121332220110. Its totient is φ = 121332220108.

The previous prime is 121332220039. The next prime is 121332220159. The reversal of 121332220109 is 901022233121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69407483209 + 51924736900 = 263453^2 + 227870^2 .

It is a cyclic number.

It is not a de Polignac number, because 121332220109 - 2³⁶ = 52612743373 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121332220159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60666110054 + 60666110055.

It is an arithmetic number, because the mean of its divisors is an integer number (60666110055).

Almost surely, 2^121332220109 is an apocalyptic number.

It is an amenable number.

121332220109 is a deficient number, since it is larger than the sum of its proper divisors (1).

121332220109 is an equidigital number, since it uses as much as digits as its factorization.

121332220109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 121332220109 in words is "one hundred twenty-one billion, three hundred thirty-two million, two hundred twenty thousand, one hundred nine".