111221102120 has 16 divisors (see below), whose sum is σ = 250247479860. Its totient is φ = 44488440832.

The previous prime is 111221102117. The next prime is 111221102143. The reversal of 111221102120 is 21201122111.

It can be written as a sum of positive squares in 2 ways, for example, as 110440570276 + 780531844 = 332326^2 + 27938^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111221102095 and 111221102104.

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, 1390263737 + ... + 1390263816.

Almost surely, 2^111221102120 is an apocalyptic number.

111221102120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221102120 is an abundant number, since it is smaller than the sum of its proper divisors (139026377740).

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

111221102120 is a wasteful number, since it uses less digits than its factorization.

111221102120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2780527564 (or 2780527560 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111221102120 its reverse (21201122111), we get a palindrome (132422224231).

The spelling of 111221102120 in words is "one hundred eleven billion, two hundred twenty-one million, one hundred two thousand, one hundred twenty".