111111222204 has 36 divisors (see below), whose sum is σ = 291266868984. Its totient is φ = 37037073744.

The previous prime is 111111222191. The next prime is 111111222223. The reversal of 111111222204 is 402222111111.

It is a tau number, because it is divible by the number of its divisors (36).

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 polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57155007 + ... + 57156950.

Almost surely, 2^111111222204 is an apocalyptic number.

It is an amenable number.

111111222204 is an abundant number, since it is smaller than the sum of its proper divisors (180155646780).

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

111111222204 is a wasteful number, since it uses less digits than its factorization.

111111222204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114311976 (or 114311962 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 111111222204 its reverse (402222111111), we get a palindrome (513333333315).

The spelling of 111111222204 in words is "one hundred eleven billion, one hundred eleven million, two hundred twenty-two thousand, two hundred four".