111122201221 has 4 divisors (see below), whose sum is σ = 111327603244. Its totient is φ = 110916799200.

The previous prime is 111122201209. The next prime is 111122201227. The reversal of 111122201221 is 122102221111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37239350625 + 73882850596 = 192975^2 + 271814^2 .

It is a cyclic number.

It is not a de Polignac number, because 111122201221 - 2⁷ = 111122201093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111122201195 and 111122201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111122201227) 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, 102700200 + ... + 102701281.

It is an arithmetic number, because the mean of its divisors is an integer number (27831900811).

Almost surely, 2^111122201221 is an apocalyptic number.

It is an amenable number.

111122201221 is a deficient number, since it is larger than the sum of its proper divisors (205402023).

111122201221 is an equidigital number, since it uses as much as digits as its factorization.

111122201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205402022.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111122201221 its reverse (122102221111), we get a palindrome (233224422332).

The spelling of 111122201221 in words is "one hundred eleven billion, one hundred twenty-two million, two hundred one thousand, two hundred twenty-one".