221100012222 has 32 divisors (see below), whose sum is σ = 454184164224. Its totient is φ = 71702935200.

The previous prime is 221100012187. The next prime is 221100012247. The reversal of 221100012222 is 222210001122.

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, 4131697 + ... + 4184867.

It is an arithmetic number, because the mean of its divisors is an integer number (14193255132).

Almost surely, 2^221100012222 is an apocalyptic number.

221100012222 is an abundant number, since it is smaller than the sum of its proper divisors (233084152002).

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

221100012222 is a wasteful number, since it uses less digits than its factorization.

221100012222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71944.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221100012222 its reverse (222210001122), we get a palindrome (443310013344).

It can be divided in two parts, 2211000 and 12222, that added together give a palindrome (2223222).

The spelling of 221100012222 in words is "two hundred twenty-one billion, one hundred million, twelve thousand, two hundred twenty-two".