221012111222 has 32 divisors (see below), whose sum is σ = 379876511232. Its totient is φ = 94470151104.

The previous prime is 221012111189. The next prime is 221012111251. The reversal of 221012111222 is 222111210122.

It is a self number, because there is not a number n which added to its sum of digits gives 221012111222.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8619473 + ... + 8645075.

It is an arithmetic number, because the mean of its divisors is an integer number (11871140976).

Almost surely, 2^221012111222 is an apocalyptic number.

221012111222 is a deficient number, since it is larger than the sum of its proper divisors (158864400010).

221012111222 is a wasteful number, since it uses less digits than its factorization.

221012111222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27212.

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

Adding to 221012111222 its reverse (222111210122), we get a palindrome (443123321344).

The spelling of 221012111222 in words is "two hundred twenty-one billion, twelve million, one hundred eleven thousand, two hundred twenty-two".