12042121144 has 8 divisors (see below), whose sum is σ = 22578977160. Its totient is φ = 6021060568.

The previous prime is 12042121141. The next prime is 12042121171. The reversal of 12042121144 is 44112124021.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12042121141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 752632564 + ... + 752632579.

It is an arithmetic number, because the mean of its divisors is an integer number (2822372145).

Almost surely, 2^12042121144 is an apocalyptic number.

It is an amenable number.

12042121144 is a deficient number, since it is larger than the sum of its proper divisors (10536856016).

12042121144 is a wasteful number, since it uses less digits than its factorization.

12042121144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505265149 (or 1505265145 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 12042121144 its reverse (44112124021), we get a palindrome (56154245165).

The spelling of 12042121144 in words is "twelve billion, forty-two million, one hundred twenty-one thousand, one hundred forty-four".