221210212222 has 8 divisors (see below), whose sum is σ = 346242071376. Its totient is φ = 105796188432.

The previous prime is 221210212187. The next prime is 221210212247. The reversal of 221210212222 is 222212012122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 221210212222.

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 3 ways as a sum of consecutive naturals, for example, 2404458783 + ... + 2404458874.

It is an arithmetic number, because the mean of its divisors is an integer number (43280258922).

Almost surely, 2^221210212222 is an apocalyptic number.

221210212222 is a deficient number, since it is larger than the sum of its proper divisors (125031859154).

221210212222 is a wasteful number, since it uses less digits than its factorization.

221210212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4808917682.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221210212222 its reverse (222212012122), we get a palindrome (443422224344).

The spelling of 221210212222 in words is "two hundred twenty-one billion, two hundred ten million, two hundred twelve thousand, two hundred twenty-two".