221221100112011 has 16 divisors (see below), whose sum is σ = 233879974387200. Its totient is φ = 208665772408800.

The previous prime is 221221100111989. The next prime is 221221100112017. The reversal of 221221100112011 is 110211001122122.

It is a cyclic number.

It is not a de Polignac number, because 221221100112011 - 2¹⁰ = 221221100110987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221221100112017) 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, 23488796 + ... + 31530393.

It is an arithmetic number, because the mean of its divisors is an integer number (14617498399200).

Almost surely, 2^{221221100112011} is an apocalyptic number.

221221100112011 is a deficient number, since it is larger than the sum of its proper divisors (12658874275189).

221221100112011 is a wasteful number, since it uses less digits than its factorization.

221221100112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55020130.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221221100112011 its reverse (110211001122122), we get a palindrome (331432101234133).

The spelling of 221221100112011 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, one hundred million, one hundred twelve thousand, eleven".