221111220012211 has 16 divisors (see below), whose sum is σ = 227621166312960. Its totient is φ = 214680954552480.

The previous prime is 221111220012187. The next prime is 221111220012229. The reversal of 221111220012211 is 112210022111122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221111220012211 - 2³⁷ = 220973781058739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221111220012251) 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, 19636705 + ... + 28771906.

It is an arithmetic number, because the mean of its divisors is an integer number (14226322894560).

Almost surely, 2^{221111220012211} is an apocalyptic number.

221111220012211 is a deficient number, since it is larger than the sum of its proper divisors (6509946300749).

221111220012211 is a wasteful number, since it uses less digits than its factorization.

221111220012211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48409434.

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

Adding to 221111220012211 its reverse (112210022111122), we get a palindrome (333321242123333).

The spelling of 221111220012211 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred twenty million, twelve thousand, two hundred eleven".