12221432424 has 24 divisors (see below), whose sum is σ = 33099713010. Its totient is φ = 4073810784.

The previous prime is 12221432423. The next prime is 12221432429. The reversal of 12221432424 is 42423412221.

It is a happy number.

12221432424 is a `hidden beast` number, since 1 + 2 + 221 + 432 + 4 + 2 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11644568100 + 576864324 = 107910^2 + 24018^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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 (12221432423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84870987 + ... + 84871130.

Almost surely, 2^12221432424 is an apocalyptic number.

It is an amenable number.

12221432424 is an abundant number, since it is smaller than the sum of its proper divisors (20878280586).

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

12221432424 is a wasteful number, since it uses less digits than its factorization.

12221432424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169742129 (or 169742122 counting only the distinct ones).

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

Adding to 12221432424 its reverse (42423412221), we get a palindrome (54644844645).

The spelling of 12221432424 in words is "twelve billion, two hundred twenty-one million, four hundred thirty-two thousand, four hundred twenty-four".