112221222212221 has 4 divisors (see below), whose sum is σ = 112224813437500. Its totient is φ = 112217630986944.

The previous prime is 112221222212213. The next prime is 112221222212233. The reversal of 112221222212221 is 122212222122211.

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 56304178039321 + 55917044172900 = 7503611^2 + 7477770^2 .

It is a cyclic number.

It is not a de Polignac number, because 112221222212221 - 2³ = 112221222212213 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 (112221222212251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1795565766 + ... + 1795628263.

It is an arithmetic number, because the mean of its divisors is an integer number (28056203359375).

Almost surely, 2^{112221222212221} is an apocalyptic number.

It is an amenable number.

112221222212221 is a deficient number, since it is larger than the sum of its proper divisors (3591225279).

112221222212221 is an equidigital number, since it uses as much as digits as its factorization.

112221222212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3591225278.

The product of its digits is 1024, while the sum is 25.

Adding to 112221222212221 its reverse (122212222122211), we get a palindrome (234433444334432).

The spelling of 112221222212221 in words is "one hundred twelve trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred twelve thousand, two hundred twenty-one".