120221909 has 8 divisors (see below), whose sum is σ = 128531520. Its totient is φ = 112049856.

The previous prime is 120221891. The next prime is 120221923. The reversal of 120221909 is 909122021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 120221909 - 2⁸ = 120221653 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 (120221929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32579 + ... + 36080.

It is an arithmetic number, because the mean of its divisors is an integer number (16066440).

Almost surely, 2^120221909 is an apocalyptic number.

It is an amenable number.

120221909 is a deficient number, since it is larger than the sum of its proper divisors (8309611).

120221909 is a wasteful number, since it uses less digits than its factorization.

120221909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68779.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 120221909 is about 10964.5751855692. The cubic root of 120221909 is about 493.5462691181.

It can be divided in two parts, 12022 and 1909, that added together give a palindrome (13931).

The spelling of 120221909 in words is "one hundred twenty million, two hundred twenty-one thousand, nine hundred nine".