120120421 has 4 divisors (see below), whose sum is σ = 125343072. Its totient is φ = 114897772.

The previous prime is 120120293. The next prime is 120120431. The reversal of 120120421 is 124021021.

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.

It is a cyclic number.

It is not a de Polignac number, because 120120421 - 2⁷ = 120120293 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 (120120431) 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 3 ways as a sum of consecutive naturals, for example, 2611291 + ... + 2611336.

It is an arithmetic number, because the mean of its divisors is an integer number (31335768).

Almost surely, 2^120120421 is an apocalyptic number.

It is an amenable number.

120120421 is a deficient number, since it is larger than the sum of its proper divisors (5222651).

120120421 is an equidigital number, since it uses as much as digits as its factorization.

120120421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5222650.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 120120421 is about 10959.9462133717. The cubic root of 120120421 is about 493.4073506648.

Adding to 120120421 its reverse (124021021), we get a palindrome (244141442).

The spelling of 120120421 in words is "one hundred twenty million, one hundred twenty thousand, four hundred twenty-one".