120424221 has 12 divisors (see below), whose sum is σ = 174086848. Its totient is φ = 80217864.

The previous prime is 120424217. The next prime is 120424229. The reversal of 120424221 is 122424021.

120424221 is a `hidden beast` number, since 1 + 20 + 424 + 221 = 666.

It is not a de Polignac number, because 120424221 - 2² = 120424217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120424194 and 120424203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120424229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8106 + ... + 17508.

Almost surely, 2^120424221 is an apocalyptic number.

It is an amenable number.

120424221 is a deficient number, since it is larger than the sum of its proper divisors (53662627).

120424221 is a wasteful number, since it uses less digits than its factorization.

120424221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10832 (or 10829 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 120424221 is about 10973.7970183524. The cubic root of 120424221 is about 493.8229640396.

Adding to 120424221 its reverse (122424021), we get a palindrome (242848242).

It can be divided in two parts, 1204 and 24221, that added together give a triangular number (25425 = T₂₂₅).

The spelling of 120424221 in words is "one hundred twenty million, four hundred twenty-four thousand, two hundred twenty-one".