111102221123221 has 4 divisors (see below), whose sum is σ = 111102242799744. Its totient is φ = 111102199446700.

The previous prime is 111102221123213. The next prime is 111102221123237. The reversal of 111102221123221 is 122321122201111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111102221123221 - 2³ = 111102221123213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111102221123192 and 111102221123201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111102221123251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1634586 + ... + 14995876.

It is an arithmetic number, because the mean of its divisors is an integer number (27775560699936).

Almost surely, 2^{111102221123221} is an apocalyptic number.

It is an amenable number.

111102221123221 is a deficient number, since it is larger than the sum of its proper divisors (21676523).

111102221123221 is an equidigital number, since it uses as much as digits as its factorization.

111102221123221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21676522.

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 111102221123221 its reverse (122321122201111), we get a palindrome (233423343324332).

The spelling of 111102221123221 in words is "one hundred eleven trillion, one hundred two billion, two hundred twenty-one million, one hundred twenty-three thousand, two hundred twenty-one".