12002122021 has 4 divisors (see below), whose sum is σ = 12002421600. Its totient is φ = 12001822444.

The previous prime is 12002122001. The next prime is 12002122057. The reversal of 12002122021 is 12022120021.

It is a happy number.

12002122021 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12002122021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12002121992 and 12002122010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002122001) 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, 78331 + ... + 173608.

It is an arithmetic number, because the mean of its divisors is an integer number (3000605400).

Almost surely, 2^12002122021 is an apocalyptic number.

It is an amenable number.

12002122021 is a deficient number, since it is larger than the sum of its proper divisors (299579).

12002122021 is an equidigital number, since it uses as much as digits as its factorization.

12002122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299578.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12002122021 its reverse (12022120021), we get a palindrome (24024242042).

The spelling of 12002122021 in words is "twelve billion, two million, one hundred twenty-two thousand, twenty-one".