11321000203 has 4 divisors (see below), whose sum is σ = 11322048880. Its totient is φ = 11319951528.

The previous prime is 11321000189. The next prime is 11321000231. The reversal of 11321000203 is 30200012311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30200012311 = 7 ⋅4314287473.

It is a cyclic number.

It is not a de Polignac number, because 11321000203 - 2²¹ = 11318903051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11321000233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 507975 + ... + 529792.

It is an arithmetic number, because the mean of its divisors is an integer number (2830512220).

Almost surely, 2^11321000203 is an apocalyptic number.

11321000203 is a deficient number, since it is larger than the sum of its proper divisors (1048677).

11321000203 is a wasteful number, since it uses less digits than its factorization.

11321000203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048676.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 11321000203 its reverse (30200012311), we get a palindrome (41521012514).

The spelling of 11321000203 in words is "eleven billion, three hundred twenty-one million, two hundred three", and thus it is an aban number.