111111211122102 has 24 divisors (see below), whose sum is σ = 248506794768960. Its totient is φ = 35842326168240.

The previous prime is 111111211122061. The next prime is 111111211122113. The reversal of 111111211122102 is 201221112111111.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99562016577 + ... + 99562017692.

It is an arithmetic number, because the mean of its divisors is an integer number (10354449782040).

Almost surely, 2^{111111211122102} is an apocalyptic number.

111111211122102 is an abundant number, since it is smaller than the sum of its proper divisors (137395583646858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111111211122102 is a wasteful number, since it uses less digits than its factorization.

111111211122102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199124034308 (or 199124034305 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 18.

Adding to 111111211122102 its reverse (201221112111111), we get a palindrome (312332323233213).

The spelling of 111111211122102 in words is "one hundred eleven trillion, one hundred eleven billion, two hundred eleven million, one hundred twenty-two thousand, one hundred two".