203103030321 has 6 divisors (see below), whose sum is σ = 293371043810. Its totient is φ = 135402020208.

The previous prime is 203103030307. The next prime is 203103030329. The reversal of 203103030321 is 123030301302.

203103030321 is a `hidden beast` number, since 2 + 0 + 310 + 3 + 0 + 30 + 321 = 666.

It can be written as a sum of positive squares in only one way, i.e., 181834016400 + 21269013921 = 426420^2 + 145839^2 .

It is not a de Polignac number, because 203103030321 - 2⁵ = 203103030289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203103030294 and 203103030303.

It is not an unprimeable number, because it can be changed into a prime (203103030329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11283501676 + ... + 11283501693.

Almost surely, 2^203103030321 is an apocalyptic number.

It is an amenable number.

203103030321 is a deficient number, since it is larger than the sum of its proper divisors (90268013489).

203103030321 is a wasteful number, since it uses less digits than its factorization.

203103030321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22567003375 (or 22567003372 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 203103030321 its reverse (123030301302), we get a palindrome (326133331623).

The spelling of 203103030321 in words is "two hundred three billion, one hundred three million, thirty thousand, three hundred twenty-one".