222221221110 has 96 divisors (see below), whose sum is σ = 666852443712. Its totient is φ = 50290502400.

The previous prime is 222221221109. The next prime is 222221221139. The reversal of 222221221110 is 11122122222.

It is a happy number.

222221221110 is a `hidden beast` number, since 222 + 221 + 2 + 211 + 10 = 666.

It is a super-2 number, since 2×222221221110² (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 polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1682569 + ... + 1809828.

It is an arithmetic number, because the mean of its divisors is an integer number (6946379622).

Almost surely, 2^222221221110 is an apocalyptic number.

222221221110 is an abundant number, since it is smaller than the sum of its proper divisors (444631222602).

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

222221221110 is a wasteful number, since it uses less digits than its factorization.

222221221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3492518 (or 3492515 counting only the distinct ones).

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

Adding to 222221221110 its reverse (11122122222), we get a palindrome (233343343332).

The spelling of 222221221110 in words is "two hundred twenty-two billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred ten".