120123021 has 4 divisors (see below), whose sum is σ = 160164032. Its totient is φ = 80082012.

The previous prime is 120123019. The next prime is 120123041. The reversal of 120123021 is 120321021.

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: 120321021 = 3 ⋅40107007.

It is not a de Polignac number, because 120123021 - 2¹ = 120123019 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 120122988 and 120123006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120123001) 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, 20020501 + ... + 20020506.

It is an arithmetic number, because the mean of its divisors is an integer number (40041008).

Almost surely, 2^120123021 is an apocalyptic number.

It is an amenable number.

120123021 is a deficient number, since it is larger than the sum of its proper divisors (40041011).

120123021 is an equidigital number, since it uses as much as digits as its factorization.

120123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40041010.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 120123021 is about 10960.0648264506. The cubic root of 120123021 is about 493.4109105642.

Adding to 120123021 its reverse (120321021), we get a palindrome (240444042).

The spelling of 120123021 in words is "one hundred twenty million, one hundred twenty-three thousand, twenty-one".