12133210021 has 4 divisors (see below), whose sum is σ = 12133465344. Its totient is φ = 12132954700.

The previous prime is 12133210013. The next prime is 12133210039. The reversal of 12133210021 is 12001233121.

12133210021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12001233121 = 25127 ⋅477623.

It is a cyclic number.

It is not a de Polignac number, because 12133210021 - 2³ = 12133210013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12133209977 and 12133210004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12133210051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32965 + ... + 159226.

It is an arithmetic number, because the mean of its divisors is an integer number (3033366336).

Almost surely, 2^12133210021 is an apocalyptic number.

It is an amenable number.

12133210021 is a deficient number, since it is larger than the sum of its proper divisors (255323).

12133210021 is an equidigital number, since it uses as much as digits as its factorization.

12133210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255322.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12133210021 its reverse (12001233121), we get a palindrome (24134443142).

The spelling of 12133210021 in words is "twelve billion, one hundred thirty-three million, two hundred ten thousand, twenty-one".