111221201022211 has 16 divisors (see below), whose sum is σ = 127318849622784. Its totient is φ = 95175811512864.

The previous prime is 111221201022209. The next prime is 111221201022223. The reversal of 111221201022211 is 112220102122111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111221201022211 - 2¹ = 111221201022209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111221201022611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39612520 + ... + 42327226.

It is an arithmetic number, because the mean of its divisors is an integer number (7957428101424).

Almost surely, 2^{111221201022211} is an apocalyptic number.

111221201022211 is a deficient number, since it is larger than the sum of its proper divisors (16097648600573).

111221201022211 is an equidigital number, since it uses as much as digits as its factorization.

111221201022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2724330.

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

Adding to 111221201022211 its reverse (112220102122111), we get a palindrome (223441303144322).

The spelling of 111221201022211 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred one million, twenty-two thousand, two hundred eleven".