111138023 has 4 divisors (see below), whose sum is σ = 111351048. Its totient is φ = 110925000.

The previous prime is 111138019. The next prime is 111138067. The reversal of 111138023 is 320831111.

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

It is a cyclic number.

It is not a de Polignac number, because 111138023 - 2² = 111138019 is a prime.

It is a super-3 number, since 3×111138023³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111137986 and 111138004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111138073) 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, 105728 + ... + 106773.

It is an arithmetic number, because the mean of its divisors is an integer number (27837762).

Almost surely, 2^111138023 is an apocalyptic number.

111138023 is a deficient number, since it is larger than the sum of its proper divisors (213025).

111138023 is an equidigital number, since it uses as much as digits as its factorization.

111138023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213024.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 111138023 is about 10542.2019995824. The cubic root of 111138023 is about 480.7886672961.

Adding to 111138023 its reverse (320831111), we get a palindrome (431969134).

The spelling of 111138023 in words is "one hundred eleven million, one hundred thirty-eight thousand, twenty-three".