221122222211 has 8 divisors (see below), whose sum is σ = 241597085184. Its totient is φ = 200709499720.

The previous prime is 221122222207. The next prime is 221122222247. The reversal of 221122222211 is 112222221122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221122222211 - 2² = 221122222207 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (221122222291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15527675 + ... + 15541908.

It is an arithmetic number, because the mean of its divisors is an integer number (30199635648).

Almost surely, 2^221122222211 is an apocalyptic number.

221122222211 is a deficient number, since it is larger than the sum of its proper divisors (20474862973).

221122222211 is a wasteful number, since it uses less digits than its factorization.

221122222211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31070241.

The product of its digits is 256, while the sum is 20.

Adding to 221122222211 its reverse (112222221122), we get a palindrome (333344443333).

It can be divided in two parts, 22 and 1122222211, that multiplied together give a palindrome (24688888642).

The spelling of 221122222211 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-two thousand, two hundred eleven".