11231203203 has 16 divisors (see below), whose sum is σ = 18151440000. Its totient is φ = 6806789640.

The previous prime is 11231203199. The next prime is 11231203213. The reversal of 11231203203 is 30230213211.

It is not a de Polignac number, because 11231203203 - 2² = 11231203199 is a prime.

It is a super-2 number, since 2×11231203203² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11231203213) 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 15 ways as a sum of consecutive naturals, for example, 18907453 + ... + 18908046.

It is an arithmetic number, because the mean of its divisors is an integer number (1134465000).

Almost surely, 2^11231203203 is an apocalyptic number.

11231203203 is a deficient number, since it is larger than the sum of its proper divisors (6920236797).

11231203203 is a wasteful number, since it uses less digits than its factorization.

11231203203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37815519 (or 37815513 counting only the distinct ones).

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

Adding to 11231203203 its reverse (30230213211), we get a palindrome (41461416414).

The spelling of 11231203203 in words is "eleven billion, two hundred thirty-one million, two hundred three thousand, two hundred three".