12424444442 has 4 divisors (see below), whose sum is σ = 18636666666. Its totient is φ = 6212222220.

The previous prime is 12424444433. The next prime is 12424444447. The reversal of 12424444442 is 24444442421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24444442421 = 7 ⋅3492063203.

It can be written as a sum of positive squares in only one way, i.e., 9422390761 + 3002053681 = 97069^2 + 54791^2 .

It is not an unprimeable number, because it can be changed into a prime (12424444447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3106111109 + ... + 3106111112.

Almost surely, 2^12424444442 is an apocalyptic number.

12424444442 is a deficient number, since it is larger than the sum of its proper divisors (6212222224).

12424444442 is an equidigital number, since it uses as much as digits as its factorization.

12424444442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6212222223.

The product of its digits is 131072, while the sum is 35.

Adding to 12424444442 its reverse (24444442421), we get a palindrome (36868886863).

The spelling of 12424444442 in words is "twelve billion, four hundred twenty-four million, four hundred forty-four thousand, four hundred forty-two".