111113031 has 4 divisors (see below), whose sum is σ = 148150712. Its totient is φ = 74075352.

The previous prime is 111113017. The next prime is 111113053. The reversal of 111113031 is 130311111.

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

It is not a de Polignac number, because 111113031 - 2¹⁰ = 111112007 is a prime.

It is a super-2 number, since 2×111113031² = 24692211316013922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111112998 and 111113016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111113011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18518836 + ... + 18518841.

It is an arithmetic number, because the mean of its divisors is an integer number (37037678).

Almost surely, 2^111113031 is an apocalyptic number.

111113031 is a deficient number, since it is larger than the sum of its proper divisors (37037681).

111113031 is an equidigital number, since it uses as much as digits as its factorization.

111113031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37037680.

The product of its (nonzero) digits is 9, while the sum is 12.

The square root of 111113031 is about 10541.0166018274. The cubic root of 111113031 is about 480.7526257121.

Adding to 111113031 its reverse (130311111), we get a palindrome (241424142).

It can be divided in two parts, 1111 and 13031, that multiplied together give a palindrome (14477441).

The spelling of 111113031 in words is "one hundred eleven million, one hundred thirteen thousand, thirty-one".