12112405421 has 8 divisors (see below), whose sum is σ = 12425967840. Its totient is φ = 11800292112.

The previous prime is 12112405387. The next prime is 12112405447. The reversal of 12112405421 is 12450421121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12112405421 - 2²² = 12108211117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112405451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345335 + ... + 378788.

It is an arithmetic number, because the mean of its divisors is an integer number (1553245980).

Almost surely, 2^12112405421 is an apocalyptic number.

It is an amenable number.

12112405421 is a deficient number, since it is larger than the sum of its proper divisors (313562419).

12112405421 is an equidigital number, since it uses as much as digits as its factorization.

12112405421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724555.

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 12112405421 its reverse (12450421121), we get a palindrome (24562826542).

The spelling of 12112405421 in words is "twelve billion, one hundred twelve million, four hundred five thousand, four hundred twenty-one".