120142321 has 4 divisors (see below), whose sum is σ = 129384052. Its totient is φ = 110900592.

The previous prime is 120142313. The next prime is 120142333. The reversal of 120142321 is 123241021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123241021 = 1723 ⋅71527.

It can be written as a sum of positive squares in 2 ways, for example, as 74390625 + 45751696 = 8625^2 + 6764^2 .

It is a cyclic number.

It is not a de Polignac number, because 120142321 - 2³ = 120142313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120142295 and 120142304.

It is not an unprimeable number, because it can be changed into a prime (120142021) 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, 4620846 + ... + 4620871.

It is an arithmetic number, because the mean of its divisors is an integer number (32346013).

Almost surely, 2^120142321 is an apocalyptic number.

It is an amenable number.

120142321 is a deficient number, since it is larger than the sum of its proper divisors (9241731).

120142321 is an equidigital number, since it uses as much as digits as its factorization.

120142321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9241730.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 120142321 is about 10960.9452603322. The cubic root of 120142321 is about 493.4373343658.

Adding to 120142321 its reverse (123241021), we get a palindrome (243383342).

The spelling of 120142321 in words is "one hundred twenty million, one hundred forty-two thousand, three hundred twenty-one".