12404555540421 has 32 divisors (see below), whose sum is σ = 18056455262208. Its totient is φ = 7512303152640.

The previous prime is 12404555540417. The next prime is 12404555540437.

12404555540421 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12404555540421 - 2² = 12404555540417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12404555540401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 812713036 + ... + 812728298.

It is an arithmetic number, because the mean of its divisors is an integer number (564264226944).

Almost surely, 2^{12404555540421} is an apocalyptic number.

12404555540421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12404555540421 is a deficient number, since it is larger than the sum of its proper divisors (5651899721787).

12404555540421 is a wasteful number, since it uses less digits than its factorization.

12404555540421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32041.

The product of its (nonzero) digits is 640000, while the sum is 42.

It can be divided in two parts, 1240455 and 5540421, that added together give a palindrome (6780876).

The spelling of 12404555540421 in words is "twelve trillion, four hundred four billion, five hundred fifty-five million, five hundred forty thousand, four hundred twenty-one".