111102123221 has 8 divisors (see below), whose sum is σ = 117779460120. Its totient is φ = 104440555008.

The previous prime is 111102123193. The next prime is 111102123239. The reversal of 111102123221 is 122321201111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 63309604996 + 47792518225 = 251614^2 + 218615^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111102123221 - 2⁶ = 111102123157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111102123221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111102923221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3927656 + ... + 3955841.

It is an arithmetic number, because the mean of its divisors is an integer number (14722432515).

Almost surely, 2^111102123221 is an apocalyptic number.

It is an amenable number.

111102123221 is a deficient number, since it is larger than the sum of its proper divisors (6677336899).

111102123221 is an equidigital number, since it uses as much as digits as its factorization.

111102123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7884343.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 111102123221 its reverse (122321201111), we get a palindrome (233423324332).

The spelling of 111102123221 in words is "one hundred eleven billion, one hundred two million, one hundred twenty-three thousand, two hundred twenty-one".