120144221 has 2 divisors, whose sum is σ = 120144222. Its totient is φ = 120144220.

The previous prime is 120144209. The next prime is 120144257. The reversal of 120144221 is 122441021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92371321 + 27772900 = 9611^2 + 5270^2 .

It is a cyclic number.

It is not a de Polignac number, because 120144221 - 2¹⁴ = 120127837 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120144221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120144121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60072110 + 60072111.

It is an arithmetic number, because the mean of its divisors is an integer number (60072111).

Almost surely, 2^120144221 is an apocalyptic number.

It is an amenable number.

120144221 is a deficient number, since it is larger than the sum of its proper divisors (1).

120144221 is an equidigital number, since it uses as much as digits as its factorization.

120144221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 120144221 is about 10961.0319313466. The cubic root of 120144221 is about 493.4399355197.

Adding to 120144221 its reverse (122441021), we get a palindrome (242585242).

The spelling of 120144221 in words is "one hundred twenty million, one hundred forty-four thousand, two hundred twenty-one".