12404133111421 has 4 divisors (see below), whose sum is σ = 12441607834144. Its totient is φ = 12366658388700.

The previous prime is 12404133111343. The next prime is 12404133111427. The reversal of 12404133111421 is 12411133140421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12404133111421 - 2¹⁵ = 12404133078653 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 12404133111421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12404133111427) 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, 18737360865 + ... + 18737361526.

It is an arithmetic number, because the mean of its divisors is an integer number (3110401958536).

Almost surely, 2^{12404133111421} is an apocalyptic number.

It is an amenable number.

12404133111421 is a deficient number, since it is larger than the sum of its proper divisors (37474722723).

12404133111421 is an equidigital number, since it uses as much as digits as its factorization.

12404133111421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37474722722.

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 12404133111421 its reverse (12411133140421), we get a palindrome (24815266251842).

The spelling of 12404133111421 in words is "twelve trillion, four hundred four billion, one hundred thirty-three million, one hundred eleven thousand, four hundred twenty-one".