203011330421 has 2 divisors, whose sum is σ = 203011330422. Its totient is φ = 203011330420.

The previous prime is 203011330399. The next prime is 203011330481. The reversal of 203011330421 is 124033110302.

203011330421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138652714321 + 64358616100 = 372361^2 + 253690^2 .

It is a cyclic number.

It is not a de Polignac number, because 203011330421 - 2³⁰ = 201937588597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203011330393 and 203011330402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203011330481) 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, 101505665210 + 101505665211.

It is an arithmetic number, because the mean of its divisors is an integer number (101505665211).

Almost surely, 2^203011330421 is an apocalyptic number.

It is an amenable number.

203011330421 is a deficient number, since it is larger than the sum of its proper divisors (1).

203011330421 is an equidigital number, since it uses as much as digits as its factorization.

203011330421 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 20.

Adding to 203011330421 its reverse (124033110302), we get a palindrome (327044440723).

The spelling of 203011330421 in words is "two hundred three billion, eleven million, three hundred thirty thousand, four hundred twenty-one".