120221218 has 32 divisors (see below), whose sum is σ = 199197936. Its totient is φ = 54079488.

The previous prime is 120221203. The next prime is 120221221. The reversal of 120221218 is 812122021.

It can be written as a sum of positive squares in 8 ways, for example, as 23454649 + 96766569 = 4843^2 + 9837^2 .

It is a junction number, because it is equal to n+sod(n) for n = 120221195 and 120221204.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 183780 + ... + 184432.

Almost surely, 2^120221218 is an apocalyptic number.

120221218 is a deficient number, since it is larger than the sum of its proper divisors (78976718).

120221218 is a wasteful number, since it uses less digits than its factorization.

120221218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 120221218 is about 10964.5436749552. The cubic root of 120221218 is about 493.5453235303.

Adding to 120221218 its reverse (812122021), we get a palindrome (932343239).

The spelling of 120221218 in words is "one hundred twenty million, two hundred twenty-one thousand, two hundred eighteen".