12424331232221 has 8 divisors (see below), whose sum is σ = 12467895880440. Its totient is φ = 12380813862912.

The previous prime is 12424331232199. The next prime is 12424331232253. The reversal of 12424331232221 is 12223213342421.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 135899136025 + 12288432096196 = 368645^2 + 3505486^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12424331232221 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 (12424331235221) 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, 11293190 + ... + 12344423.

It is an arithmetic number, because the mean of its divisors is an integer number (1558486985055).

Almost surely, 2^{12424331232221} is an apocalyptic number.

It is an amenable number.

12424331232221 is a deficient number, since it is larger than the sum of its proper divisors (43564648219).

12424331232221 is a wasteful number, since it uses less digits than its factorization.

12424331232221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23639455.

The product of its digits is 27648, while the sum is 32.

Adding to 12424331232221 its reverse (12223213342421), we get a palindrome (24647544574642).

The spelling of 12424331232221 in words is "twelve trillion, four hundred twenty-four billion, three hundred thirty-one million, two hundred thirty-two thousand, two hundred twenty-one".