111221110111112 has 8 divisors (see below), whose sum is σ = 208539581458350. Its totient is φ = 55610555055552.

The previous prime is 111221110111091. The next prime is 111221110111129. The reversal of 111221110111112 is 211111011122111.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 97492202906596 + 13728907204516 = 9873814^2 + 3705254^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6951319381937 + ... + 6951319381952.

Almost surely, 2^{111221110111112} is an apocalyptic number.

It is an amenable number.

111221110111112 is a deficient number, since it is larger than the sum of its proper divisors (97318471347238).

111221110111112 is a wasteful number, since it uses less digits than its factorization.

111221110111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13902638763895 (or 13902638763891 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 17.

Adding to 111221110111112 its reverse (211111011122111), we get a palindrome (322332121233223).

The spelling of 111221110111112 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred ten million, one hundred eleven thousand, one hundred twelve".