12421442198 has 16 divisors (see below), whose sum is σ = 20875348944. Its totient is φ = 5493512160.

The previous prime is 12421442191. The next prime is 12421442213. The reversal of 12421442198 is 89124412421.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 7629065 + ... + 7630692.

It is an arithmetic number, because the mean of its divisors is an integer number (1304709309).

Almost surely, 2^12421442198 is an apocalyptic number.

12421442198 is a deficient number, since it is larger than the sum of its proper divisors (8453906746).

12421442198 is a wasteful number, since it uses less digits than its factorization.

12421442198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15259807.

The product of its digits is 36864, while the sum is 38.

The spelling of 12421442198 in words is "twelve billion, four hundred twenty-one million, four hundred forty-two thousand, one hundred ninety-eight".