221201022222 has 24 divisors (see below), whose sum is σ = 492222095976. Its totient is φ = 71740871856.

The previous prime is 221201022221. The next prime is 221201022241. The reversal of 221201022222 is 222220102122.

221201022222 is a `hidden beast` number, since 221 + 201 + 0 + 22 + 222 = 666.

221201022222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221201022195 and 221201022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221201022221) 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 11 ways as a sum of consecutive naturals, for example, 166066168 + ... + 166067499.

It is an arithmetic number, because the mean of its divisors is an integer number (20509253999).

Almost surely, 2^221201022222 is an apocalyptic number.

221201022222 is an abundant number, since it is smaller than the sum of its proper divisors (271021073754).

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

221201022222 is a wasteful number, since it uses less digits than its factorization.

221201022222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332133712 (or 332133709 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 221201022222 its reverse (222220102122), we get a palindrome (443421124344).

The spelling of 221201022222 in words is "two hundred twenty-one billion, two hundred one million, twenty-two thousand, two hundred twenty-two".