111440131 has 4 divisors (see below), whose sum is σ = 121571064. Its totient is φ = 101309200.

The previous prime is 111440123. The next prime is 111440137. The reversal of 111440131 is 131044111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131044111 = 11 ⋅11913101.

It is a cyclic number.

It is not a de Polignac number, because 111440131 - 2³ = 111440123 is a prime.

It is a super-2 number, since 2×111440131² = 24837805594594322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111440137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5065450 + ... + 5065471.

It is an arithmetic number, because the mean of its divisors is an integer number (30392766).

Almost surely, 2^111440131 is an apocalyptic number.

111440131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111440131 is a deficient number, since it is larger than the sum of its proper divisors (10130933).

111440131 is a wasteful number, since it uses less digits than its factorization.

111440131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10130932.

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

The square root of 111440131 is about 10556.5207810149. The cubic root of 111440131 is about 481.2239179433.

Adding to 111440131 its reverse (131044111), we get a palindrome (242484242).

The spelling of 111440131 in words is "one hundred eleven million, four hundred forty thousand, one hundred thirty-one".