12013224144 has 20 divisors (see below), whose sum is σ = 31034162496. Its totient is φ = 4004408032.

The previous prime is 12013224143. The next prime is 12013224173. The reversal of 12013224144 is 44142231021.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013224143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125137704 + ... + 125137799.

Almost surely, 2^12013224144 is an apocalyptic number.

It is an amenable number.

12013224144 is an abundant number, since it is smaller than the sum of its proper divisors (19020938352).

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

12013224144 is a wasteful number, since it uses less digits than its factorization.

12013224144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250275514 (or 250275508 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 12013224144 its reverse (44142231021), we get a palindrome (56155455165).

The spelling of 12013224144 in words is "twelve billion, thirteen million, two hundred twenty-four thousand, one hundred forty-four".