120221221 has 2 divisors, whose sum is σ = 120221222. Its totient is φ = 120221220.

The previous prime is 120221203. The next prime is 120221237. The reversal of 120221221 is 122122021.

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., 87890625 + 32330596 = 9375^2 + 5686^2 .

It is a cyclic number.

It is not a de Polignac number, because 120221221 - 2¹¹ = 120219173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120221201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60110610 + 60110611.

It is an arithmetic number, because the mean of its divisors is an integer number (60110611).

Almost surely, 2^120221221 is an apocalyptic number.

It is an amenable number.

120221221 is a deficient number, since it is larger than the sum of its proper divisors (1).

120221221 is an equidigital number, since it uses as much as digits as its factorization.

120221221 is an evil number, because the sum of its binary digits is even.

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

The square root of 120221221 is about 10964.5438117598. The cubic root of 120221221 is about 493.5453276356.

Adding to 120221221 its reverse (122122021), we get a palindrome (242343242).

The spelling of 120221221 in words is "one hundred twenty million, two hundred twenty-one thousand, two hundred twenty-one".