221200212222 has 48 divisors (see below), whose sum is σ = 525080909808. Its totient is φ = 66742669440.

The previous prime is 221200212209. The next prime is 221200212229. The reversal of 221200212222 is 222212002122.

221200212222 is a `hidden beast` number, since 221 + 200 + 21 + 2 + 222 = 666.

221200212222 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 = 221200212195 and 221200212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221200212229) 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 23 ways as a sum of consecutive naturals, for example, 2351233 + ... + 2443500.

It is an arithmetic number, because the mean of its divisors is an integer number (10939185621).

Almost surely, 2^221200212222 is an apocalyptic number.

221200212222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221200212222 is an abundant number, since it is smaller than the sum of its proper divisors (303880697586).

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

221200212222 is a wasteful number, since it uses less digits than its factorization.

221200212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4794985 (or 4794982 counting only the distinct ones).

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

Adding to 221200212222 its reverse (222212002122), we get a palindrome (443412214344).

It can be divided in two parts, 2212002122 and 22, that multiplied together give a palindrome (48664046684).

The spelling of 221200212222 in words is "two hundred twenty-one billion, two hundred million, two hundred twelve thousand, two hundred twenty-two".