221100111112 has 16 divisors (see below), whose sum is σ = 420401620800. Its totient is φ = 108993012240.

The previous prime is 221100111097. The next prime is 221100111157. The reversal of 221100111112 is 211111001122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221100111092 and 221100111101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194629812 + ... + 194630947.

It is an arithmetic number, because the mean of its divisors is an integer number (26275101300).

Almost surely, 2^221100111112 is an apocalyptic number.

It is an amenable number.

221100111112 is a deficient number, since it is larger than the sum of its proper divisors (199301509688).

221100111112 is a wasteful number, since it uses less digits than its factorization.

221100111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389260836 (or 389260832 counting only the distinct ones).

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

Adding to 221100111112 its reverse (211111001122), we get a palindrome (432211112234).

The spelling of 221100111112 in words is "two hundred twenty-one billion, one hundred million, one hundred eleven thousand, one hundred twelve".