12421442199 has 4 divisors (see below), whose sum is σ = 16561922936. Its totient is φ = 8280961464.

The previous prime is 12421442191. The next prime is 12421442213. The reversal of 12421442199 is 99124412421.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12421442199 - 2³ = 12421442191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421442191) 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, 2070240364 + ... + 2070240369.

It is an arithmetic number, because the mean of its divisors is an integer number (4140480734).

Almost surely, 2^12421442199 is an apocalyptic number.

12421442199 is a deficient number, since it is larger than the sum of its proper divisors (4140480737).

12421442199 is an equidigital number, since it uses as much as digits as its factorization.

12421442199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4140480736.

The product of its digits is 41472, while the sum is 39.

It can be divided in two parts, 1242 and 1442199, that added together give a palindrome (1443441).

The spelling of 12421442199 in words is "twelve billion, four hundred twenty-one million, four hundred forty-two thousand, one hundred ninety-nine".