221022112211 has 4 divisors (see below), whose sum is σ = 221023121472. Its totient is φ = 221021102952.

The previous prime is 221022112187. The next prime is 221022112217. The reversal of 221022112211 is 112211220122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221022112211 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 221022112211.

It is not an unprimeable number, because it can be changed into a prime (221022112217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22760 + ... + 665253.

It is an arithmetic number, because the mean of its divisors is an integer number (55255780368).

Almost surely, 2^221022112211 is an apocalyptic number.

221022112211 is a deficient number, since it is larger than the sum of its proper divisors (1009261).

221022112211 is an equidigital number, since it uses as much as digits as its factorization.

221022112211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009260.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221022112211 its reverse (112211220122), we get a palindrome (333233332333).

The spelling of 221022112211 in words is "two hundred twenty-one billion, twenty-two million, one hundred twelve thousand, two hundred eleven".