12043121356 has 24 divisors (see below), whose sum is σ = 25133472000. Its totient is φ = 4936931472.

The previous prime is 12043121353. The next prime is 12043121357. The reversal of 12043121356 is 65312134021.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (12043121353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9349606 + ... + 9350893.

It is an arithmetic number, because the mean of its divisors is an integer number (1047228000).

Almost surely, 2^12043121356 is an apocalyptic number.

It is an amenable number.

12043121356 is an abundant number, since it is smaller than the sum of its proper divisors (13090350644).

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

12043121356 is a wasteful number, since it uses less digits than its factorization.

12043121356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18700533 (or 18700531 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 12043121356 its reverse (65312134021), we get a palindrome (77355255377).

The spelling of 12043121356 in words is "twelve billion, forty-three million, one hundred twenty-one thousand, three hundred fifty-six".