120240123 has 4 divisors (see below), whose sum is σ = 160320168. Its totient is φ = 80160080.

The previous prime is 120240097. The next prime is 120240137. The reversal of 120240123 is 321042021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321042021 = 3 ⋅107014007.

It is a cyclic number.

It is not a de Polignac number, because 120240123 - 2⁵ = 120240091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120240173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20040018 + ... + 20040023.

It is an arithmetic number, because the mean of its divisors is an integer number (40080042).

Almost surely, 2^120240123 is an apocalyptic number.

120240123 is a deficient number, since it is larger than the sum of its proper divisors (40080045).

120240123 is an equidigital number, since it uses as much as digits as its factorization.

120240123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40080044.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 120240123 is about 10965.4057380473. The cubic root of 120240123 is about 493.5711924672.

Adding to 120240123 its reverse (321042021), we get a palindrome (441282144).

It can be divided in two parts, 12024012 and 3, that multiplied together give a square (36072036 = 6006²).

The spelling of 120240123 in words is "one hundred twenty million, two hundred forty thousand, one hundred twenty-three".