111111102111 has 16 divisors (see below), whose sum is σ = 157606172928. Its totient is φ = 69386352000.

The previous prime is 111111102103. The next prime is 111111102119. The reversal of 111111102111 is 111201111111.

It is an interprime number because it is at equal distance from previous prime (111111102103) and next prime (111111102119).

It is not a de Polignac number, because 111111102111 - 2³ = 111111102103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111102119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5151915 + ... + 5173436.

It is an arithmetic number, because the mean of its divisors is an integer number (9850385808).

Almost surely, 2^111111102111 is an apocalyptic number.

111111102111 is a deficient number, since it is larger than the sum of its proper divisors (46495070817).

111111102111 is a wasteful number, since it uses less digits than its factorization.

111111102111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10325582.

The product of its (nonzero) digits is 2, while the sum is 12.

Adding to 111111102111 its reverse (111201111111), we get a palindrome (222312213222).

The spelling of 111111102111 in words is "one hundred eleven billion, one hundred eleven million, one hundred two thousand, one hundred eleven".