12444212421 has 24 divisors (see below), whose sum is σ = 18084081600. Its totient is φ = 8245912896.

The previous prime is 12444212357. The next prime is 12444212423. The reversal of 12444212421 is 12421244421.

12444212421 is a `hidden beast` number, since 1 + 2 + 444 + 212 + 4 + 2 + 1 = 666.

It is not a de Polignac number, because 12444212421 - 2⁶ = 12444212357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12444212423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1251150 + ... + 1261056.

It is an arithmetic number, because the mean of its divisors is an integer number (753503400).

Almost surely, 2^12444212421 is an apocalyptic number.

It is an amenable number.

12444212421 is a deficient number, since it is larger than the sum of its proper divisors (5639869179).

12444212421 is a wasteful number, since it uses less digits than its factorization.

12444212421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10745 (or 10742 counting only the distinct ones).

The product of its digits is 4096, while the sum is 27.

Adding to 12444212421 its reverse (12421244421), we get a palindrome (24865456842).

The spelling of 12444212421 in words is "twelve billion, four hundred forty-four million, two hundred twelve thousand, four hundred twenty-one".