12653443221 has 8 divisors (see below), whose sum is σ = 16872377760. Its totient is φ = 8435068752.

The previous prime is 12653443219. The next prime is 12653443237. The reversal of 12653443221 is 12234435621.

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

It is not a de Polignac number, because 12653443221 - 2¹ = 12653443219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12653443211) 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, 84111 + ... + 179948.

It is an arithmetic number, because the mean of its divisors is an integer number (2109047220).

Almost surely, 2^12653443221 is an apocalyptic number.

It is an amenable number.

12653443221 is a deficient number, since it is larger than the sum of its proper divisors (4218934539).

12653443221 is a wasteful number, since it uses less digits than its factorization.

12653443221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280035.

The product of its digits is 34560, while the sum is 33.

Adding to 12653443221 its reverse (12234435621), we get a palindrome (24887878842).

The spelling of 12653443221 in words is "twelve billion, six hundred fifty-three million, four hundred forty-three thousand, two hundred twenty-one".