11203230321 has 6 divisors (see below), whose sum is σ = 16182443810. Its totient is φ = 7468820208.

The previous prime is 11203230317. The next prime is 11203230329. The reversal of 11203230321 is 12303230211.

11203230321 is a `hidden beast` number, since 1 + 1 + 20 + 323 + 0 + 321 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8378839296 + 2824391025 = 91536^2 + 53145^2 .

It is not a de Polignac number, because 11203230321 - 2² = 11203230317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11203230294 and 11203230303.

It is not an unprimeable number, because it can be changed into a prime (11203230329) 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 in 5 ways as a sum of consecutive naturals, for example, 622401676 + ... + 622401693.

Almost surely, 2^11203230321 is an apocalyptic number.

It is an amenable number.

11203230321 is a deficient number, since it is larger than the sum of its proper divisors (4979213489).

11203230321 is a wasteful number, since it uses less digits than its factorization.

11203230321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244803375 (or 1244803372 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 11203230321 its reverse (12303230211), we get a palindrome (23506460532).

The spelling of 11203230321 in words is "eleven billion, two hundred three million, two hundred thirty thousand, three hundred twenty-one".