203041330021 has 2 divisors, whose sum is σ = 203041330022. Its totient is φ = 203041330020.

The previous prime is 203041330007. The next prime is 203041330039. The reversal of 203041330021 is 120033140302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174524253121 + 28517076900 = 417761^2 + 168870^2 .

It is a cyclic number.

It is not a de Polignac number, because 203041330021 - 2¹⁵ = 203041297253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203041330061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101520665010 + 101520665011.

It is an arithmetic number, because the mean of its divisors is an integer number (101520665011).

Almost surely, 2^203041330021 is an apocalyptic number.

It is an amenable number.

203041330021 is a deficient number, since it is larger than the sum of its proper divisors (1).

203041330021 is an equidigital number, since it uses as much as digits as its factorization.

203041330021 is an evil number, because the sum of its binary digits is even.

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

Adding to 203041330021 its reverse (120033140302), we get a palindrome (323074470323).

The spelling of 203041330021 in words is "two hundred three billion, forty-one million, three hundred thirty thousand, twenty-one".