221222110020211 has 4 divisors (see below), whose sum is σ = 221258718020632. Its totient is φ = 221185502019792.

The previous prime is 221222110020169. The next prime is 221222110020221. The reversal of 221222110020211 is 112020011222122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221222110020211 - 2⁹ = 221222110019699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221222110020221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18303991146 + ... + 18304003231.

It is an arithmetic number, because the mean of its divisors is an integer number (55314679505158).

Almost surely, 2^{221222110020211} is an apocalyptic number.

221222110020211 is a deficient number, since it is larger than the sum of its proper divisors (36608000421).

221222110020211 is an equidigital number, since it uses as much as digits as its factorization.

221222110020211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36608000420.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221222110020211 its reverse (112020011222122), we get a palindrome (333242121242333).

The spelling of 221222110020211 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, one hundred ten million, twenty thousand, two hundred eleven".