1131223203 has 24 divisors (see below), whose sum is σ = 1784090880. Its totient is φ = 684990960.

The previous prime is 1131223193. The next prime is 1131223207. The reversal of 1131223203 is 3023221311.

It is not a de Polignac number, because 1131223203 - 2⁴ = 1131223187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131223207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126250 + ... + 134912.

It is an arithmetic number, because the mean of its divisors is an integer number (74337120).

Almost surely, 2^1131223203 is an apocalyptic number.

1131223203 is a deficient number, since it is larger than the sum of its proper divisors (652867677).

1131223203 is a wasteful number, since it uses less digits than its factorization.

1131223203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9999 (or 9996 counting only the distinct ones).

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

The square root of 1131223203 is about 33633.6617542604. The cubic root of 1131223203 is about 1041.9561319600.

Adding to 1131223203 its reverse (3023221311), we get a palindrome (4154444514).

The spelling of 1131223203 in words is "one billion, one hundred thirty-one million, two hundred twenty-three thousand, two hundred three".