222221122110 has 128 divisors (see below), whose sum is σ = 640846080000. Its totient is φ = 54471505536.

The previous prime is 222221122103. The next prime is 222221122141. The reversal of 222221122110 is 11221122222.

It is a happy number.

222221122110 is a `hidden beast` number, since 2 + 222 + 211 + 221 + 10 = 666.

It is a super-2 number, since 2×222221122110² (a number of 23 digits) contains 22 as substring.

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

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 63 ways as a sum of consecutive naturals, for example, 706441 + ... + 971339.

It is an arithmetic number, because the mean of its divisors is an integer number (5006610000).

Almost surely, 2^222221122110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222221122110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320423040000).

222221122110 is an abundant number, since it is smaller than the sum of its proper divisors (418624957890).

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

222221122110 is a wasteful number, since it uses less digits than its factorization.

222221122110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265167 (or 265161 counting only the distinct ones).

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

Adding to 222221122110 its reverse (11221122222), we get a palindrome (233442244332).

The spelling of 222221122110 in words is "two hundred twenty-two billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred ten".