1131224203 has 4 divisors (see below), whose sum is σ = 1180407888. Its totient is φ = 1082040520.

The previous prime is 1131224173. The next prime is 1131224233. The reversal of 1131224203 is 3024221311.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1131224173) and next prime (1131224233).

It is a de Polignac number, because none of the positive numbers 2^k-1131224203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131224233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24591808 + ... + 24591853.

It is an arithmetic number, because the mean of its divisors is an integer number (295101972).

Almost surely, 2^1131224203 is an apocalyptic number.

1131224203 is a deficient number, since it is larger than the sum of its proper divisors (49183685).

1131224203 is an equidigital number, since it uses as much as digits as its factorization.

1131224203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49183684.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1131224203 is about 33633.6766203161. The cubic root of 1131224203 is about 1041.9564389893.

Adding to 1131224203 its reverse (3024221311), we get a palindrome (4155445514).

The spelling of 1131224203 in words is "one billion, one hundred thirty-one million, two hundred twenty-four thousand, two hundred three".