111320031 has 32 divisors (see below), whose sum is σ = 160675840. Its totient is φ = 68343264.

The previous prime is 111319997. The next prime is 111320047. The reversal of 111320031 is 130023111.

It is not a de Polignac number, because 111320031 - 2¹⁰ = 111319007 is a prime.

It is a super-3 number, since 3×111320031³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111319989 and 111320016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111320051) 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 31 ways as a sum of consecutive naturals, for example, 393216 + ... + 393498.

It is an arithmetic number, because the mean of its divisors is an integer number (5021120).

Almost surely, 2^111320031 is an apocalyptic number.

111320031 is a deficient number, since it is larger than the sum of its proper divisors (49355809).

111320031 is a wasteful number, since it uses less digits than its factorization.

111320031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 111320031 is about 10550.8308203667. The cubic root of 111320031 is about 481.0509827343.

Adding to 111320031 its reverse (130023111), we get a palindrome (241343142).

It can be divided in two parts, 1113 and 20031, that multiplied together give a triangular number (22294503 = T₆₆₇₇).

The spelling of 111320031 in words is "one hundred eleven million, three hundred twenty thousand, thirty-one".