12002230021 has 2 divisors, whose sum is σ = 12002230022. Its totient is φ = 12002230020.

The previous prime is 12002230007. The next prime is 12002230033. The reversal of 12002230021 is 12003220021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11883180100 + 119049921 = 109010^2 + 10911^2 .

It is a cyclic number.

It is not a de Polignac number, because 12002230021 - 2⁷ = 12002229893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12002229983 and 12002230010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12002236021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6001115010 + 6001115011.

It is an arithmetic number, because the mean of its divisors is an integer number (6001115011).

Almost surely, 2^12002230021 is an apocalyptic number.

It is an amenable number.

12002230021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12002230021 is an equidigital number, since it uses as much as digits as its factorization.

12002230021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 12002230021 its reverse (12003220021), we get a palindrome (24005450042).

The spelling of 12002230021 in words is "twelve billion, two million, two hundred thirty thousand, twenty-one".