203031130321 has 2 divisors, whose sum is σ = 203031130322. Its totient is φ = 203031130320.

The previous prime is 203031130307. The next prime is 203031130333. The reversal of 203031130321 is 123031130302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170539265296 + 32491865025 = 412964^2 + 180255^2 .

It is a cyclic number.

It is not a de Polignac number, because 203031130321 - 2²¹ = 203029033169 is a prime.

It is not a weakly prime, because it can be changed into another prime (203031130361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101515565160 + 101515565161.

It is an arithmetic number, because the mean of its divisors is an integer number (101515565161).

Almost surely, 2^203031130321 is an apocalyptic number.

It is an amenable number.

203031130321 is a deficient number, since it is larger than the sum of its proper divisors (1).

203031130321 is an equidigital number, since it uses as much as digits as its factorization.

203031130321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 19.

Subtracting from 203031130321 its sum of digits (19), we obtain a palindrome (203031130302).

Adding to 203031130321 its reverse (123031130302), we get a palindrome (326062260623).

The spelling of 203031130321 in words is "two hundred three billion, thirty-one million, one hundred thirty thousand, three hundred twenty-one".