121301221 has 2 divisors, whose sum is σ = 121301222. Its totient is φ = 121301220.

The previous prime is 121301203. The next prime is 121301231. The reversal of 121301221 is 122103121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107868996 + 13432225 = 10386^2 + 3665^2 .

It is a cyclic number.

It is not a de Polignac number, because 121301221 - 2⁵ = 121301189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121301231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60650610 + 60650611.

It is an arithmetic number, because the mean of its divisors is an integer number (60650611).

Almost surely, 2^121301221 is an apocalyptic number.

It is an amenable number.

121301221 is a deficient number, since it is larger than the sum of its proper divisors (1).

121301221 is an equidigital number, since it uses as much as digits as its factorization.

121301221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 121301221 is about 11013.6833529932. The cubic root of 121301221 is about 495.0188354565.

Adding to 121301221 its reverse (122103121), we get a palindrome (243404342).

The spelling of 121301221 in words is "one hundred twenty-one million, three hundred one thousand, two hundred twenty-one".