111111220102 has 16 divisors (see below), whose sum is σ = 169292823552. Its totient is φ = 54682858440.

The previous prime is 111111220079. The next prime is 111111220133. The reversal of 111111220102 is 201022111111.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 558348 + ... + 730735.

It is an arithmetic number, because the mean of its divisors is an integer number (10580801472).

Almost surely, 2^111111220102 is an apocalyptic number.

111111220102 is a deficient number, since it is larger than the sum of its proper divisors (58181603450).

111111220102 is a wasteful number, since it uses less digits than its factorization.

111111220102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289763.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111111220102 its reverse (201022111111), we get a palindrome (312133331213).

The spelling of 111111220102 in words is "one hundred eleven billion, one hundred eleven million, two hundred twenty thousand, one hundred two".