12123443144 has 8 divisors (see below), whose sum is σ = 22731455910. Its totient is φ = 6061721568.

The previous prime is 12123443071. The next prime is 12123443147. The reversal of 12123443144 is 44134432121.

12123443144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6124940644 + 5998502500 = 78262^2 + 77450^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (12123443147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 757715189 + ... + 757715204.

Almost surely, 2^12123443144 is an apocalyptic number.

It is an amenable number.

12123443144 is a deficient number, since it is larger than the sum of its proper divisors (10608012766).

12123443144 is a wasteful number, since it uses less digits than its factorization.

12123443144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515430399 (or 1515430395 counting only the distinct ones).

The product of its digits is 9216, while the sum is 29.

Adding to 12123443144 its reverse (44134432121), we get a palindrome (56257875265).

The spelling of 12123443144 in words is "twelve billion, one hundred twenty-three million, four hundred forty-three thousand, one hundred forty-four".