21110221220011 has 32 divisors (see below), whose sum is σ = 27355834298880. Its totient is φ = 15807026188800.

The previous prime is 21110221220009. The next prime is 21110221220029. The reversal of 21110221220011 is 11002212201112.

It is not a de Polignac number, because 21110221220011 - 2¹ = 21110221220009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21110221220051) 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 31 ways as a sum of consecutive naturals, for example, 21931086 + ... + 22873411.

It is an arithmetic number, because the mean of its divisors is an integer number (854869821840).

Almost surely, 2^{21110221220011} is an apocalyptic number.

21110221220011 is a deficient number, since it is larger than the sum of its proper divisors (6245613078869).

21110221220011 is a wasteful number, since it uses less digits than its factorization.

21110221220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44804755.

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

Adding to 21110221220011 its reverse (11002212201112), we get a palindrome (32112433421123).

The spelling of 21110221220011 in words is "twenty-one trillion, one hundred ten billion, two hundred twenty-one million, two hundred twenty thousand, eleven".