12003430421 has 4 divisors (see below), whose sum is σ = 12005066700. Its totient is φ = 12001794144.

The previous prime is 12003430399. The next prime is 12003430433. The reversal of 12003430421 is 12403430021.

12003430421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10223434321 + 1779996100 = 101111^2 + 42190^2 .

It is a cyclic number.

It is not a de Polignac number, because 12003430421 - 2¹⁰ = 12003429397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12003430393 and 12003430402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12003430441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 807086 + ... + 821823.

It is an arithmetic number, because the mean of its divisors is an integer number (3001266675).

Almost surely, 2^12003430421 is an apocalyptic number.

It is an amenable number.

12003430421 is a deficient number, since it is larger than the sum of its proper divisors (1636279).

12003430421 is an equidigital number, since it uses as much as digits as its factorization.

12003430421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636278.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 12003430421 its reverse (12403430021), we get a palindrome (24406860442).

The spelling of 12003430421 in words is "twelve billion, three million, four hundred thirty thousand, four hundred twenty-one".