122001221 has 2 divisors, whose sum is σ = 122001222. Its totient is φ = 122001220.

The previous prime is 122001181. The next prime is 122001259. The reversal of 122001221 is 122100221.

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., 119793025 + 2208196 = 10945^2 + 1486^2 .

It is a cyclic number.

It is not a de Polignac number, because 122001221 - 2²² = 117806917 is a prime.

122001221 is a modest number, since divided by 1221 gives 122 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122201221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61000610 + 61000611.

It is an arithmetic number, because the mean of its divisors is an integer number (61000611).

Almost surely, 2^122001221 is an apocalyptic number.

It is an amenable number.

122001221 is a deficient number, since it is larger than the sum of its proper divisors (1).

122001221 is an equidigital number, since it uses as much as digits as its factorization.

122001221 is an evil number, because the sum of its binary digits is even.

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

The square root of 122001221 is about 11045.4162891219. The cubic root of 122001221 is about 495.9692209590.

Adding to 122001221 its reverse (122100221), we get a palindrome (244101442).

The spelling of 122001221 in words is "one hundred twenty-two million, one thousand, two hundred twenty-one".