221222222000 has 80 divisors (see below), whose sum is σ = 576062733792. Its totient is φ = 81682041600.

The previous prime is 221222221967. The next prime is 221222222009. The reversal of 221222222000 is 222222122.

221222222000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 221222222000.

It is not an unprimeable number, because it can be changed into a prime (221222222009) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4228274 + ... + 4280273.

Almost surely, 2^221222222000 is an apocalyptic number.

221222222000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221222222000 is an abundant number, since it is smaller than the sum of its proper divisors (354840511792).

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

221222222000 is a wasteful number, since it uses less digits than its factorization.

221222222000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8508583 (or 8508567 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 221222222000 its reverse (222222122), we get a palindrome (221444444122).

The spelling of 221222222000 in words is "two hundred twenty-one billion, two hundred twenty-two million, two hundred twenty-two thousand".