221211112222 has 16 divisors (see below), whose sum is σ = 351348287472. Its totient is φ = 104095497600.

The previous prime is 221211112217. The next prime is 221211112249. The reversal of 221211112222 is 222211112122.

221211112222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221211112222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950968 + ... + 1160500.

It is an arithmetic number, because the mean of its divisors is an integer number (21959267967).

Almost surely, 2^221211112222 is an apocalyptic number.

221211112222 is a deficient number, since it is larger than the sum of its proper divisors (130137175250).

221211112222 is a wasteful number, since it uses less digits than its factorization.

221211112222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240603.

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

Adding to 221211112222 its reverse (222211112122), we get a palindrome (443422224344).

The spelling of 221211112222 in words is "two hundred twenty-one billion, two hundred eleven million, one hundred twelve thousand, two hundred twenty-two".