12000442921 has 4 divisors (see below), whose sum is σ = 12632045200. Its totient is φ = 11368840644.

The previous prime is 12000442913. The next prime is 12000443027. The reversal of 12000442921 is 12924400021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12000442921 - 2³ = 12000442913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12000442621) 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, 315801111 + ... + 315801148.

It is an arithmetic number, because the mean of its divisors is an integer number (3158011300).

Almost surely, 2^12000442921 is an apocalyptic number.

It is an amenable number.

12000442921 is a deficient number, since it is larger than the sum of its proper divisors (631602279).

12000442921 is an equidigital number, since it uses as much as digits as its factorization.

12000442921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631602278.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 12000442921 its reverse (12924400021), we get a palindrome (24924842942).

The spelling of 12000442921 in words is "twelve billion, four hundred forty-two thousand, nine hundred twenty-one".