122201221 has 2 divisors, whose sum is σ = 122201222. Its totient is φ = 122201220.

The previous prime is 122201207. The next prime is 122201237. The reversal of 122201221 is 122102221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121308196 + 893025 = 11014^2 + 945^2 .

It is a cyclic number.

It is not a de Polignac number, because 122201221 - 2²¹ = 120104069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122208221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61100610 + 61100611.

It is an arithmetic number, because the mean of its divisors is an integer number (61100611).

Almost surely, 2^122201221 is an apocalyptic number.

It is an amenable number.

122201221 is a deficient number, since it is larger than the sum of its proper divisors (1).

122201221 is an equidigital number, since it uses as much as digits as its factorization.

122201221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 122201221 is about 11054.4661110340. The cubic root of 122201221 is about 496.2400917174.

Adding to 122201221 its reverse (122102221), we get a palindrome (244303442).

The spelling of 122201221 in words is "one hundred twenty-two million, two hundred one thousand, two hundred twenty-one".