221122102211 has 4 divisors (see below), whose sum is σ = 234129284712. Its totient is φ = 208114919712.

The previous prime is 221122102199. The next prime is 221122102217. The reversal of 221122102211 is 112201221122.

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-221122102211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 13007182483 = 221122102211 / (2 + 2 + 1 + 1 + 2 + 2 + 1 + 0 + 2 + 2 + 1 + 1).

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 221122102211.

It is not an unprimeable number, because it can be changed into a prime (221122102217) 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, 6503591225 + ... + 6503591258.

It is an arithmetic number, because the mean of its divisors is an integer number (58532321178).

Almost surely, 2^221122102211 is an apocalyptic number.

221122102211 is a deficient number, since it is larger than the sum of its proper divisors (13007182501).

221122102211 is a wasteful number, since it uses less digits than its factorization.

221122102211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13007182500.

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

Adding to 221122102211 its reverse (112201221122), we get a palindrome (333323323333).

The spelling of 221122102211 in words is "two hundred twenty-one billion, one hundred twenty-two million, one hundred two thousand, two hundred eleven".