3243130021 has 2 divisors, whose sum is σ = 3243130022. Its totient is φ = 3243130020.

The previous prime is 3243129991. The next prime is 3243130027. The reversal of 3243130021 is 1200313423.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1662192900 + 1580937121 = 40770^2 + 39761^2 .

It is a cyclic number.

It is not a de Polignac number, because 3243130021 - 2⁹ = 3243129509 is a prime.

It is a super-2 number, since 2×3243130021² = 21035784666222920882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3243130027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1621565010 + 1621565011.

It is an arithmetic number, because the mean of its divisors is an integer number (1621565011).

Almost surely, 2^3243130021 is an apocalyptic number.

It is an amenable number.

3243130021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3243130021 is an equidigital number, since it uses as much as digits as its factorization.

3243130021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 3243130021 is about 56948.4856778475. The cubic root of 3243130021 is about 1480.2035909661.

Adding to 3243130021 its reverse (1200313423), we get a palindrome (4443443444).

The spelling of 3243130021 in words is "three billion, two hundred forty-three million, one hundred thirty thousand, twenty-one".