203322130021 has 2 divisors, whose sum is σ = 203322130022. Its totient is φ = 203322130020.

The previous prime is 203322130013. The next prime is 203322130069. The reversal of 203322130021 is 120031223302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202225593025 + 1096536996 = 449695^2 + 33114^2 .

It is a cyclic number.

It is not a de Polignac number, because 203322130021 - 2³ = 203322130013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203322130091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101661065010 + 101661065011.

It is an arithmetic number, because the mean of its divisors is an integer number (101661065011).

Almost surely, 2^203322130021 is an apocalyptic number.

It is an amenable number.

203322130021 is a deficient number, since it is larger than the sum of its proper divisors (1).

203322130021 is an equidigital number, since it uses as much as digits as its factorization.

203322130021 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 203322130021 its reverse (120031223302), we get a palindrome (323353353323).

The spelling of 203322130021 in words is "two hundred three billion, three hundred twenty-two million, one hundred thirty thousand, twenty-one".