221002220111111 has 4 divisors (see below), whose sum is σ = 221008748821224. Its totient is φ = 220995691401000.

The previous prime is 221002220111087. The next prime is 221002220111221. The reversal of 221002220111111 is 111111022200122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221002220111111 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 221002220111111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002220117111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3264304280 + ... + 3264371981.

It is an arithmetic number, because the mean of its divisors is an integer number (55252187205306).

Almost surely, 2^{221002220111111} is an apocalyptic number.

221002220111111 is a deficient number, since it is larger than the sum of its proper divisors (6528710113).

221002220111111 is an equidigital number, since it uses as much as digits as its factorization.

221002220111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6528710112.

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

Adding to 221002220111111 its reverse (111111022200122), we get a palindrome (332113242311233).

The spelling of 221002220111111 in words is "two hundred twenty-one trillion, two billion, two hundred twenty million, one hundred eleven thousand, one hundred eleven".