12443242212 has 18 divisors (see below), whose sum is σ = 31453751238. Its totient is φ = 4147747392.

The previous prime is 12443242187. The next prime is 12443242219. The reversal of 12443242212 is 21224234421.

It is a happy number.

12443242212 is a `hidden beast` number, since 1 + 2 + 4 + 432 + 4 + 221 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11456277156 + 986965056 = 107034^2 + 31416^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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

It is not an unprimeable number, because it can be changed into a prime (12443242219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 172822773 + ... + 172822844.

Almost surely, 2^12443242212 is an apocalyptic number.

12443242212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12443242212 is an abundant number, since it is smaller than the sum of its proper divisors (19010509026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12443242212 is a wasteful number, since it uses less digits than its factorization.

12443242212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345645627 (or 345645622 counting only the distinct ones).

The product of its digits is 6144, while the sum is 27.

Adding to 12443242212 its reverse (21224234421), we get a palindrome (33667476633).

The spelling of 12443242212 in words is "twelve billion, four hundred forty-three million, two hundred forty-two thousand, two hundred twelve".