111444113221 has 16 divisors (see below), whose sum is σ = 133202386944. Its totient is φ = 91164016944.

The previous prime is 111444113177. The next prime is 111444113227. The reversal of 111444113221 is 122311444111.

It is not a de Polignac number, because 111444113221 - 2¹⁵ = 111444080453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111444113227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 709941 + ... + 852586.

It is an arithmetic number, because the mean of its divisors is an integer number (8325149184).

Almost surely, 2^111444113221 is an apocalyptic number.

It is an amenable number.

111444113221 is a deficient number, since it is larger than the sum of its proper divisors (21758273723).

111444113221 is a wasteful number, since it uses less digits than its factorization.

111444113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563000.

The product of its digits is 768, while the sum is 25.

Adding to 111444113221 its reverse (122311444111), we get a palindrome (233755557332).

The spelling of 111444113221 in words is "one hundred eleven billion, four hundred forty-four million, one hundred thirteen thousand, two hundred twenty-one".