121330217 has 2 divisors, whose sum is σ = 121330218. Its totient is φ = 121330216.

The previous prime is 121330213. The next prime is 121330277. The reversal of 121330217 is 712033121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119880601 + 1449616 = 10949^2 + 1204^2 .

It is a cyclic number.

It is not a de Polignac number, because 121330217 - 2² = 121330213 is a prime.

It is not a weakly prime, because it can be changed into another prime (121330211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60665108 + 60665109.

It is an arithmetic number, because the mean of its divisors is an integer number (60665109).

Almost surely, 2^121330217 is an apocalyptic number.

It is an amenable number.

121330217 is a deficient number, since it is larger than the sum of its proper divisors (1).

121330217 is an equidigital number, since it uses as much as digits as its factorization.

121330217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 121330217 is about 11014.9996368588. Note that the first 3 decimals coincide. The cubic root of 121330217 is about 495.0582756272.

Adding to 121330217 its reverse (712033121), we get a palindrome (833363338).

The spelling of 121330217 in words is "one hundred twenty-one million, three hundred thirty thousand, two hundred seventeen".