221101122211 has 16 divisors (see below), whose sum is σ = 239431645440. Its totient is φ = 203516707680.

The previous prime is 221101122199. The next prime is 221101122217. The reversal of 221101122211 is 112221101122.

It is a cyclic number.

It is not a de Polignac number, because 221101122211 - 2⁷ = 221101122083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221101122217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 962125 + ... + 1169566.

It is an arithmetic number, because the mean of its divisors is an integer number (14964477840).

Almost surely, 2^221101122211 is an apocalyptic number.

221101122211 is a deficient number, since it is larger than the sum of its proper divisors (18330523229).

221101122211 is a wasteful number, since it uses less digits than its factorization.

221101122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131866.

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

Adding to 221101122211 its reverse (112221101122), we get a palindrome (333322223333).

The spelling of 221101122211 in words is "two hundred twenty-one billion, one hundred one million, one hundred twenty-two thousand, two hundred eleven".