12232130021 has 2 divisors, whose sum is σ = 12232130022. Its totient is φ = 12232130020.

The previous prime is 12232130017. The next prime is 12232130039. The reversal of 12232130021 is 12003123221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9333492100 + 2898637921 = 96610^2 + 53839^2 .

It is a cyclic number.

It is not a de Polignac number, because 12232130021 - 2² = 12232130017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12232130051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6116065010 + 6116065011.

It is an arithmetic number, because the mean of its divisors is an integer number (6116065011).

Almost surely, 2^12232130021 is an apocalyptic number.

It is an amenable number.

12232130021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12232130021 is an equidigital number, since it uses as much as digits as its factorization.

12232130021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 12232130021 its reverse (12003123221), we get a palindrome (24235253242).

The spelling of 12232130021 in words is "twelve billion, two hundred thirty-two million, one hundred thirty thousand, twenty-one".