221011221122211 has 16 divisors (see below), whose sum is σ = 317349713630880. Its totient is φ = 136006790484480.

The previous prime is 221011221122191. The next prime is 221011221122257. The reversal of 221011221122211 is 112221122110122.

It is not a de Polignac number, because 221011221122211 - 2⁶ = 221011221122147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221011221122011) 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, 82811005 + ... + 85438193.

It is an arithmetic number, because the mean of its divisors is an integer number (19834357101930).

Almost surely, 2^{221011221122211} is an apocalyptic number.

221011221122211 is a deficient number, since it is larger than the sum of its proper divisors (96338492508669).

221011221122211 is a wasteful number, since it uses less digits than its factorization.

221011221122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4784246.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 221011221122211 its reverse (112221122110122), we get a palindrome (333232343232333).

The spelling of 221011221122211 in words is "two hundred twenty-one trillion, eleven billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred eleven".