111221200112221 has 8 divisors (see below), whose sum is σ = 117777176989560. Its totient is φ = 104666729161728.

The previous prime is 111221200112201. The next prime is 111221200112257. The reversal of 111221200112221 is 122211002122111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 51740256024900 + 59480944087321 = 7193070^2 + 7712389^2 .

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 111221200112221 - 2¹⁹ = 111221199587933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221200112201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376329646 + ... + 376625071.

It is an arithmetic number, because the mean of its divisors is an integer number (14722147123695).

Almost surely, 2^{111221200112221} is an apocalyptic number.

It is an amenable number.

111221200112221 is a deficient number, since it is larger than the sum of its proper divisors (6555976877339).

111221200112221 is an equidigital number, since it uses as much as digits as its factorization.

111221200112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752963423.

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

Adding to 111221200112221 its reverse (122211002122111), we get a palindrome (233432202234332).

The spelling of 111221200112221 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred million, one hundred twelve thousand, two hundred twenty-one".