221211221122 has 16 divisors (see below), whose sum is σ = 339648756480. Its totient is φ = 108005691168.

The previous prime is 221211221051. The next prime is 221211221201. The reversal of 221211221122 is 221122112122.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 221211221122.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2639043 + ... + 2721574.

It is an arithmetic number, because the mean of its divisors is an integer number (21228047280).

Almost surely, 2^221211221122 is an apocalyptic number.

221211221122 is a deficient number, since it is larger than the sum of its proper divisors (118437535358).

221211221122 is a wasteful number, since it uses less digits than its factorization.

221211221122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5361105.

The product of its digits is 128, while the sum is 19.

Adding to 221211221122 its reverse (221122112122), we get a palindrome (442333333244).

The spelling of 221211221122 in words is "two hundred twenty-one billion, two hundred eleven million, two hundred twenty-one thousand, one hundred twenty-two".