131111203 has 4 divisors (see below), whose sum is σ = 131250600. Its totient is φ = 130971808.

The previous prime is 131111177. The next prime is 131111207. The reversal of 131111203 is 302111131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131111203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131111207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68278 + ... + 70171.

It is an arithmetic number, because the mean of its divisors is an integer number (32812650).

Almost surely, 2^131111203 is an apocalyptic number.

131111203 is a deficient number, since it is larger than the sum of its proper divisors (139397).

131111203 is an equidigital number, since it uses as much as digits as its factorization.

131111203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139396.

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

The square root of 131111203 is about 11450.3800373612. The cubic root of 131111203 is about 508.0189752042.

Adding to 131111203 its reverse (302111131), we get a palindrome (433222334).

The spelling of 131111203 in words is "one hundred thirty-one million, one hundred eleven thousand, two hundred three".