120232421 has 4 divisors (see below), whose sum is σ = 121039500. Its totient is φ = 119425344.

The previous prime is 120232397. The next prime is 120232423. The reversal of 120232421 is 124232021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124232021 = 1049 ⋅118429.

It can be written as a sum of positive squares in 2 ways, for example, as 32604100 + 87628321 = 5710^2 + 9361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120232421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120232421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120232423) 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, 403316 + ... + 403613.

It is an arithmetic number, because the mean of its divisors is an integer number (30259875).

Almost surely, 2^120232421 is an apocalyptic number.

It is an amenable number.

120232421 is a deficient number, since it is larger than the sum of its proper divisors (807079).

120232421 is an equidigital number, since it uses as much as digits as its factorization.

120232421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807078.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 120232421 is about 10965.0545370281. The cubic root of 120232421 is about 493.5606536487.

Adding to 120232421 its reverse (124232021), we get a palindrome (244464442).

The spelling of 120232421 in words is "one hundred twenty million, two hundred thirty-two thousand, four hundred twenty-one".