12403400430421 has 48 divisors (see below), whose sum is σ = 17036083209600. Its totient is φ = 8876693992320.

The previous prime is 12403400430371. The next prime is 12403400430433.

12403400430421 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12403400430421 - 2²⁹ = 12402863559509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12403400430421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12403400430821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3053206 + ... + 5841991.

It is an arithmetic number, because the mean of its divisors is an integer number (354918400200).

Almost surely, 2^{12403400430421} is an apocalyptic number.

12403400430421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12403400430421 is a deficient number, since it is larger than the sum of its proper divisors (4632682779179).

12403400430421 is a wasteful number, since it uses less digits than its factorization.

12403400430421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8895434 (or 8895427 counting only the distinct ones).

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

It can be divided in two parts, 12403400 and 430421, that added together give a palindrome (12833821).

The spelling of 12403400430421 in words is "twelve trillion, four hundred three billion, four hundred million, four hundred thirty thousand, four hundred twenty-one".