111102110221 has 16 divisors (see below), whose sum is σ = 115845505200. Its totient is φ = 106421672448.

The previous prime is 111102110191. The next prime is 111102110257. The reversal of 111102110221 is 122011201111.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 669515625 + 110432594596 = 25875^2 + 332314^2 .

It is a cyclic number.

It is not a de Polignac number, because 111102110221 - 2⁹ = 111102109709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111102110281) 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, 2954425 + ... + 2991793.

It is an arithmetic number, because the mean of its divisors is an integer number (7240344075).

Almost surely, 2^111102110221 is an apocalyptic number.

It is an amenable number.

111102110221 is a deficient number, since it is larger than the sum of its proper divisors (4743394979).

111102110221 is a wasteful number, since it uses less digits than its factorization.

111102110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38208.

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

Adding to 111102110221 its reverse (122011201111), we get a palindrome (233113311332).

The spelling of 111102110221 in words is "one hundred eleven billion, one hundred two million, one hundred ten thousand, two hundred twenty-one".