12081040921 has 8 divisors (see below), whose sum is σ = 12720060800. Its totient is φ = 11442338640.

The previous prime is 12081040919. The next prime is 12081040981. The reversal of 12081040921 is 12904018021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12081040921 - 2¹ = 12081040919 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12081040921.

It is not an unprimeable number, because it can be changed into a prime (12081040981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 775 + ... + 155443.

It is an arithmetic number, because the mean of its divisors is an integer number (1590007600).

Almost surely, 2^12081040921 is an apocalyptic number.

It is an amenable number.

12081040921 is a deficient number, since it is larger than the sum of its proper divisors (639019879).

12081040921 is a wasteful number, since it uses less digits than its factorization.

12081040921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158799.

The product of its (nonzero) digits is 1152, while the sum is 28.

Adding to 12081040921 its reverse (12904018021), we get a palindrome (24985058942).

The spelling of 12081040921 in words is "twelve billion, eighty-one million, forty thousand, nine hundred twenty-one".