12421424144 has 20 divisors (see below), whose sum is σ = 24461044140. Its totient is φ = 6108896640.

The previous prime is 12421424123. The next prime is 12421424203. The reversal of 12421424144 is 44142412421.

It can be written as a sum of positive squares in 2 ways, for example, as 268566544 + 12152857600 = 16388^2 + 110240^2 .

It is a super-2 number, since 2×12421424144² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6362459 + ... + 6364410.

It is an arithmetic number, because the mean of its divisors is an integer number (1223052207).

Almost surely, 2^12421424144 is an apocalyptic number.

It is an amenable number.

12421424144 is a deficient number, since it is larger than the sum of its proper divisors (12039619996).

12421424144 is a wasteful number, since it uses less digits than its factorization.

12421424144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12726938 (or 12726932 counting only the distinct ones).

The product of its digits is 8192, while the sum is 29.

Adding to 12421424144 its reverse (44142412421), we get a palindrome (56563836565).

The spelling of 12421424144 in words is "twelve billion, four hundred twenty-one million, four hundred twenty-four thousand, one hundred forty-four".