221000222111111 has 4 divisors (see below), whose sum is σ = 221005313035224. Its totient is φ = 220995131187000.

The previous prime is 221000222111083. The next prime is 221000222111131. The reversal of 221000222111111 is 111111222000122.

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 221000222111111 - 2⁴² = 216602175600007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221000222111111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000222111131) 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, 2545396940 + ... + 2545483761.

It is an arithmetic number, because the mean of its divisors is an integer number (55251328258806).

Almost surely, 2^{221000222111111} is an apocalyptic number.

221000222111111 is a deficient number, since it is larger than the sum of its proper divisors (5090924113).

221000222111111 is an equidigital number, since it uses as much as digits as its factorization.

221000222111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5090924112.

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

Adding to 221000222111111 its reverse (111111222000122), we get a palindrome (332111444111233).

The spelling of 221000222111111 in words is "two hundred twenty-one trillion, two hundred twenty-two million, one hundred eleven thousand, one hundred eleven".