111102111 has 20 divisors (see below), whose sum is σ = 166617000. Its totient is φ = 73778256.

The previous prime is 111102097. The next prime is 111102119. The reversal of 111102111 is 111201111.

It is a de Polignac number, because none of the positive numbers 2^k-111102111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 111102093 and 111102102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111102119) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19240 + ... + 24338.

It is an arithmetic number, because the mean of its divisors is an integer number (8330850).

Almost surely, 2^111102111 is an apocalyptic number.

111102111 is a deficient number, since it is larger than the sum of its proper divisors (55514889).

111102111 is an equidigital number, since it uses as much as digits as its factorization.

111102111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5380 (or 5371 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

The square root of 111102111 is about 10540.4986124946. The cubic root of 111102111 is about 480.7368760123.

Adding to 111102111 its reverse (111201111), we get a palindrome (222303222).

The spelling of 111102111 in words is "one hundred eleven million, one hundred two thousand, one hundred eleven".