221111100222 has 32 divisors (see below), whose sum is σ = 446295882240. Its totient is φ = 73027264800.

The previous prime is 221111100191. The next prime is 221111100227. The reversal of 221111100222 is 222001111122.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221111100227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38743 + ... + 666125.

It is an arithmetic number, because the mean of its divisors is an integer number (13946746320).

Almost surely, 2^221111100222 is an apocalyptic number.

221111100222 is an abundant number, since it is smaller than the sum of its proper divisors (225184782018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221111100222 is a wasteful number, since it uses less digits than its factorization.

221111100222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627928.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221111100222 its reverse (222001111122), we get a palindrome (443112211344).

The spelling of 221111100222 in words is "two hundred twenty-one billion, one hundred eleven million, one hundred thousand, two hundred twenty-two".