12012330021 has 4 divisors (see below), whose sum is σ = 16016440032. Its totient is φ = 8008220012.

The previous prime is 12012330007. The next prime is 12012330049. The reversal of 12012330021 is 12003321021.

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 12012330021 - 2⁶ = 12012329957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012338021) 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, 2002055001 + ... + 2002055006.

It is an arithmetic number, because the mean of its divisors is an integer number (4004110008).

Almost surely, 2^12012330021 is an apocalyptic number.

It is an amenable number.

12012330021 is a deficient number, since it is larger than the sum of its proper divisors (4004110011).

12012330021 is an equidigital number, since it uses as much as digits as its factorization.

12012330021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004110010.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 12012330021 its reverse (12003321021), we get a palindrome (24015651042).

The spelling of 12012330021 in words is "twelve billion, twelve million, three hundred thirty thousand, twenty-one".