121220201 has 2 divisors, whose sum is σ = 121220202. Its totient is φ = 121220200.

The previous prime is 121220179. The next prime is 121220213. The reversal of 121220201 is 102022121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72931600 + 48288601 = 8540^2 + 6949^2 .

It is an emirp because it is prime and its reverse (102022121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121220201 - 2²² = 117025897 is a prime.

It is not a weakly prime, because it can be changed into another prime (121220101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610100 + 60610101.

It is an arithmetic number, because the mean of its divisors is an integer number (60610101).

Almost surely, 2^121220201 is an apocalyptic number.

It is an amenable number.

121220201 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220201 is an equidigital number, since it uses as much as digits as its factorization.

121220201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 121220201 is about 11010.0045867384. The cubic root of 121220201 is about 494.9085992517.

Adding to 121220201 its reverse (102022121), we get a palindrome (223242322).

The spelling of 121220201 in words is "one hundred twenty-one million, two hundred twenty thousand, two hundred one".