12421044191 has 2 divisors, whose sum is σ = 12421044192. Its totient is φ = 12421044190.

The previous prime is 12421044187. The next prime is 12421044247. The reversal of 12421044191 is 19144012421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12421044191 - 2² = 12421044187 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12421044121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210522095 + 6210522096.

It is an arithmetic number, because the mean of its divisors is an integer number (6210522096).

Almost surely, 2^12421044191 is an apocalyptic number.

12421044191 is a deficient number, since it is larger than the sum of its proper divisors (1).

12421044191 is an equidigital number, since it uses as much as digits as its factorization.

12421044191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

The spelling of 12421044191 in words is "twelve billion, four hundred twenty-one million, forty-four thousand, one hundred ninety-one".