120221217 has 12 divisors (see below), whose sum is σ = 174804864. Its totient is φ = 79615800.

The previous prime is 120221203. The next prime is 120221221. The reversal of 120221217 is 712122021.

It is a happy number.

It is not a de Polignac number, because 120221217 - 2⁴ = 120221201 is a prime.

It is a super-2 number, since 2×120221217² = 28906282033922178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 120221217.

It is not an unprimeable number, because it can be changed into a prime (120221237) 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 in 11 ways as a sum of consecutive naturals, for example, 42873 + ... + 45590.

It is an arithmetic number, because the mean of its divisors is an integer number (14567072).

Almost surely, 2^120221217 is an apocalyptic number.

It is an amenable number.

120221217 is a deficient number, since it is larger than the sum of its proper divisors (54583647).

120221217 is a wasteful number, since it uses less digits than its factorization.

120221217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88620 (or 88617 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 120221217 is about 10964.5436293537. The cubic root of 120221217 is about 493.5453221618.

Adding to 120221217 its reverse (712122021), we get a palindrome (832343238).

The spelling of 120221217 in words is "one hundred twenty million, two hundred twenty-one thousand, two hundred seventeen".