222211221210 has 448 divisors, whose sum is σ = 685372907520. Its totient is φ = 51356592000.

The previous prime is 222211221161. The next prime is 222211221223. The reversal of 222211221210 is 12122112222.

It is a happy number.

222211221210 is a `hidden beast` number, since 2 + 22 + 211 + 221 + 210 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 176497561 + ... + 176498819.

It is an arithmetic number, because the mean of its divisors is an integer number (1529850240).

Almost surely, 2^222211221210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222211221210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342686453760).

222211221210 is an abundant number, since it is smaller than the sum of its proper divisors (463161686310).

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

222211221210 is a wasteful number, since it uses less digits than its factorization.

222211221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397 (or 1382 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 222211221210 its reverse (12122112222), we get a palindrome (234333333432).

It can be divided in two parts, 2222112212 and 10, that added together give a palindrome (2222112222).

The spelling of 222211221210 in words is "two hundred twenty-two billion, two hundred eleven million, two hundred twenty-one thousand, two hundred ten".