12243634221 has 32 divisors (see below), whose sum is σ = 20635164928. Its totient is φ = 6283630080.

The previous prime is 12243634213. The next prime is 12243634253.

12243634221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12243634221 - 2³ = 12243634213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12243634021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 595960 + ... + 616161.

It is an arithmetic number, because the mean of its divisors is an integer number (644848904).

Almost surely, 2^12243634221 is an apocalyptic number.

It is an amenable number.

12243634221 is a deficient number, since it is larger than the sum of its proper divisors (8391530707).

12243634221 is a wasteful number, since it uses less digits than its factorization.

12243634221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212181.

The product of its digits is 13824, while the sum is 30.

The spelling of 12243634221 in words is "twelve billion, two hundred forty-three million, six hundred thirty-four thousand, two hundred twenty-one".