111222102211021 has 4 divisors (see below), whose sum is σ = 111222445687200. Its totient is φ = 111221758734844.

The previous prime is 111222102210997. The next prime is 111222102211027. The reversal of 111222102211021 is 120112201222111.

It is a happy number.

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 111222102211021 - 2⁹ = 111222102210509 is a prime.

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 111222102211021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222102211027) 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, 171251911 + ... + 171900148.

It is an arithmetic number, because the mean of its divisors is an integer number (27805611421800).

Almost surely, 2^{111222102211021} is an apocalyptic number.

It is an amenable number.

111222102211021 is a deficient number, since it is larger than the sum of its proper divisors (343476179).

111222102211021 is an equidigital number, since it uses as much as digits as its factorization.

111222102211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343476178.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111222102211021 its reverse (120112201222111), we get a palindrome (231334303433132).

The spelling of 111222102211021 in words is "one hundred eleven trillion, two hundred twenty-two billion, one hundred two million, two hundred eleven thousand, twenty-one".