12432423421 has 6 divisors (see below), whose sum is σ = 13665391166. Its totient is φ = 11302203000.

The previous prime is 12432423413. The next prime is 12432423433.

12432423421 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 11981710521 + 450712900 = 109461^2 + 21230^2 .

It is not a de Polignac number, because 12432423421 - 2³ = 12432423413 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 12432423421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12432423491) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51373530 + ... + 51373771.

Almost surely, 2^12432423421 is an apocalyptic number.

12432423421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12432423421 is a deficient number, since it is larger than the sum of its proper divisors (1232967745).

12432423421 is a wasteful number, since it uses less digits than its factorization.

12432423421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102747323 (or 102747312 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

The spelling of 12432423421 in words is "twelve billion, four hundred thirty-two million, four hundred twenty-three thousand, four hundred twenty-one".