131224111 has 4 divisors (see below), whose sum is σ = 131509224. Its totient is φ = 130939000.

The previous prime is 131224097. The next prime is 131224157. The reversal of 131224111 is 111422131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111422131 = 17 ⋅6554243.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131224111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131224711) 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, 141865 + ... + 142786.

It is an arithmetic number, because the mean of its divisors is an integer number (32877306).

Almost surely, 2^131224111 is an apocalyptic number.

131224111 is a deficient number, since it is larger than the sum of its proper divisors (285113).

131224111 is an equidigital number, since it uses as much as digits as its factorization.

131224111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285112.

The product of its digits is 48, while the sum is 16.

The square root of 131224111 is about 11455.3092930745. The cubic root of 131224111 is about 508.1647622607.

Adding to 131224111 its reverse (111422131), we get a palindrome (242646242).

The spelling of 131224111 in words is "one hundred thirty-one million, two hundred twenty-four thousand, one hundred eleven".