12236863221 has 72 divisors (see below), whose sum is σ = 20199422880. Its totient is φ = 7126954560.

The previous prime is 12236863217. The next prime is 12236863241.

12236863221 is a `hidden beast` number, since 12 + 2 + 3 + 6 + 8 + 632 + 2 + 1 = 666.

12236863221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12236863221 - 2² = 12236863217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12236863241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3342490 + ... + 3346148.

It is an arithmetic number, because the mean of its divisors is an integer number (280547540).

Almost surely, 2^12236863221 is an apocalyptic number.

12236863221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12236863221 is a deficient number, since it is larger than the sum of its proper divisors (7962559659).

12236863221 is a wasteful number, since it uses less digits than its factorization.

12236863221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3807 (or 3793 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The spelling of 12236863221 in words is "twelve billion, two hundred thirty-six million, eight hundred sixty-three thousand, two hundred twenty-one".