120424021 has 4 divisors (see below), whose sum is σ = 125659872. Its totient is φ = 115188172.

The previous prime is 120424019. The next prime is 120424061.

120424021 is nontrivially palindromic in base 10.

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.

It is a cyclic number.

It is not a de Polignac number, because 120424021 - 2¹ = 120424019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120423986 and 120424004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120424061) 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, 2617891 + ... + 2617936.

It is an arithmetic number, because the mean of its divisors is an integer number (31414968).

Almost surely, 2^120424021 is an apocalyptic number.

It is an amenable number.

120424021 is a deficient number, since it is larger than the sum of its proper divisors (5235851).

120424021 is an equidigital number, since it uses as much as digits as its factorization.

120424021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5235850.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 120424021 is about 10973.7879057325. The cubic root of 120424021 is about 493.8226906598.

The spelling of 120424021 in words is "one hundred twenty million, four hundred twenty-four thousand, twenty-one".