221020111222211 has 6 divisors (see below), whose sum is σ = 257105027340180. Its totient is φ = 189445809618996.

The previous prime is 221020111222189. The next prime is 221020111222223. The reversal of 221020111222211 is 112222111020122.

It is not a de Polignac number, because 221020111222211 - 2¹⁴ = 221020111205827 is a prime.

It is a super-3 number, since 3×221020111222211³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221020111122211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2255307257321 + ... + 2255307257418.

It is an arithmetic number, because the mean of its divisors is an integer number (42850837890030).

Almost surely, 2^{221020111222211} is an apocalyptic number.

221020111222211 is a deficient number, since it is larger than the sum of its proper divisors (36084916117969).

221020111222211 is an equidigital number, since it uses as much as digits as its factorization.

221020111222211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4510614514753 (or 4510614514746 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221020111222211 its reverse (112222111020122), we get a palindrome (333242222242333).

The spelling of 221020111222211 in words is "two hundred twenty-one trillion, twenty billion, one hundred eleven million, two hundred twenty-two thousand, two hundred eleven".