221001122222 has 16 divisors (see below), whose sum is σ = 332742967200. Its totient is φ = 110086945920.

The previous prime is 221001122219. The next prime is 221001122231. The reversal of 221001122222 is 222221100122.

It is a happy number.

221001122222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 221001122222.

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, 3270554 + ... + 3337442.

It is an arithmetic number, because the mean of its divisors is an integer number (20796435450).

Almost surely, 2^221001122222 is an apocalyptic number.

221001122222 is a deficient number, since it is larger than the sum of its proper divisors (111741844978).

221001122222 is a wasteful number, since it uses less digits than its factorization.

221001122222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73051.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221001122222 its reverse (222221100122), we get a palindrome (443222222344).

The spelling of 221001122222 in words is "two hundred twenty-one billion, one million, one hundred twenty-two thousand, two hundred twenty-two".