12123424444 has 6 divisors (see below), whose sum is σ = 21215992784. Its totient is φ = 6061712220.

The previous prime is 12123424441. The next prime is 12123424457. The reversal of 12123424444 is 44442432121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123424441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1515428052 + ... + 1515428059.

Almost surely, 2^12123424444 is an apocalyptic number.

It is an amenable number.

12123424444 is a deficient number, since it is larger than the sum of its proper divisors (9092568340).

12123424444 is a wasteful number, since it uses less digits than its factorization.

12123424444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030856115 (or 3030856113 counting only the distinct ones).

The product of its digits is 24576, while the sum is 31.

Adding to 12123424444 its reverse (44442432121), we get a palindrome (56565856565).

The spelling of 12123424444 in words is "twelve billion, one hundred twenty-three million, four hundred twenty-four thousand, four hundred forty-four".