111221011233 has 6 divisors (see below), whose sum is σ = 160652571794. Its totient is φ = 74147340816.

The previous prime is 111221011183. The next prime is 111221011241. The reversal of 111221011233 is 332110122111.

It can be written as a sum of positive squares in only one way, i.e., 104550695649 + 6670315584 = 323343^2 + 81672^2 .

It is not a de Polignac number, because 111221011233 - 2¹⁰ = 111221010209 is a prime.

It is a super-2 number, since 2×111221011233² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111221011283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6178945060 + ... + 6178945077.

Almost surely, 2^111221011233 is an apocalyptic number.

It is an amenable number.

111221011233 is a deficient number, since it is larger than the sum of its proper divisors (49431560561).

111221011233 is a wasteful number, since it uses less digits than its factorization.

111221011233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12357890143 (or 12357890140 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 111221011233 its reverse (332110122111), we get a palindrome (443331133344).

The spelling of 111221011233 in words is "one hundred eleven billion, two hundred twenty-one million, eleven thousand, two hundred thirty-three".