1131110203 has 4 divisors (see below), whose sum is σ = 1131200208. Its totient is φ = 1131020200.

The previous prime is 1131110179. The next prime is 1131110209. The reversal of 1131110203 is 3020111311.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1131110203 - 2¹⁷ = 1130979131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131110209) 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 3 ways as a sum of consecutive naturals, for example, 22351 + ... + 52552.

It is an arithmetic number, because the mean of its divisors is an integer number (282800052).

Almost surely, 2^1131110203 is an apocalyptic number.

1131110203 is a deficient number, since it is larger than the sum of its proper divisors (90005).

1131110203 is an equidigital number, since it uses as much as digits as its factorization.

1131110203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90004.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1131110203 is about 33631.9818476402. The cubic root of 1131110203 is about 1041.9214364896.

Adding to 1131110203 its reverse (3020111311), we get a palindrome (4151221514).

The spelling of 1131110203 in words is "one billion, one hundred thirty-one million, one hundred ten thousand, two hundred three".