12105044512 has 144 divisors (see below), whose sum is σ = 27255638592. Its totient is φ = 5247728640.

The previous prime is 12105044507. The next prime is 12105044521. The reversal of 12105044512 is 21544050121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30491098 + ... + 30491494.

It is an arithmetic number, because the mean of its divisors is an integer number (189275268).

Almost surely, 2^12105044512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12105044512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13627819296).

12105044512 is an abundant number, since it is smaller than the sum of its proper divisors (15150594080).

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

12105044512 is a wasteful number, since it uses less digits than its factorization.

12105044512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579 (or 542 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 12105044512 its reverse (21544050121), we get a palindrome (33649094633).

The spelling of 12105044512 in words is "twelve billion, one hundred five million, forty-four thousand, five hundred twelve".