121332121 has 2 divisors, whose sum is σ = 121332122. Its totient is φ = 121332120.

The previous prime is 121332089. The next prime is 121332191. The reversal of 121332121 is 121233121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121242121 + 90000 = 11011^2 + 300^2 .

It is an emirp because it is prime and its reverse (121233121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121332121 - 2⁵ = 121332089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121332095 and 121332104.

It is not a weakly prime, because it can be changed into another prime (121332191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60666060 + 60666061.

It is an arithmetic number, because the mean of its divisors is an integer number (60666061).

Almost surely, 2^121332121 is an apocalyptic number.

It is an amenable number.

121332121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121332121 is an equidigital number, since it uses as much as digits as its factorization.

121332121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72, while the sum is 16.

The square root of 121332121 is about 11015.0860641213. The cubic root of 121332121 is about 495.0608652158.

Adding to 121332121 its reverse (121233121), we get a palindrome (242565242).

The spelling of 121332121 in words is "one hundred twenty-one million, three hundred thirty-two thousand, one hundred twenty-one".