11123131203 has 12 divisors (see below), whose sum is σ = 16458617448. Its totient is φ = 7234556640.

The previous prime is 11123131181. The next prime is 11123131219. The reversal of 11123131203 is 30213132111.

It is not a de Polignac number, because 11123131203 - 2⁶ = 11123131139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11123131003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15071625 + ... + 15072362.

It is an arithmetic number, because the mean of its divisors is an integer number (1371551454).

Almost surely, 2^11123131203 is an apocalyptic number.

11123131203 is a deficient number, since it is larger than the sum of its proper divisors (5335486245).

11123131203 is a wasteful number, since it uses less digits than its factorization.

11123131203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30144034 (or 30144031 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 11123131203 its reverse (30213132111), we get a palindrome (41336263314).

The spelling of 11123131203 in words is "eleven billion, one hundred twenty-three million, one hundred thirty-one thousand, two hundred three".