120201221 has 4 divisors (see below), whose sum is σ = 137372832. Its totient is φ = 103029612.

The previous prime is 120201209. The next prime is 120201227. The reversal of 120201221 is 122102021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122102021 = 311 ⋅392611.

It is a de Polignac number, because none of the positive numbers 2^k-120201221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120201227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8585795 + ... + 8585808.

It is an arithmetic number, because the mean of its divisors is an integer number (34343208).

Almost surely, 2^120201221 is an apocalyptic number.

It is an amenable number.

120201221 is a deficient number, since it is larger than the sum of its proper divisors (17171611).

120201221 is an equidigital number, since it uses as much as digits as its factorization.

120201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17171610.

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

The square root of 120201221 is about 10963.6317431771. The cubic root of 120201221 is about 493.5179573874.

Adding to 120201221 its reverse (122102021), we get a palindrome (242303242).

The spelling of 120201221 in words is "one hundred twenty million, two hundred one thousand, two hundred twenty-one".