221110221222 has 24 divisors (see below), whose sum is σ = 522624159720. Its totient is φ = 67003097280.

The previous prime is 221110221203. The next prime is 221110221247. The reversal of 221110221222 is 222122011122.

It is a happy number.

221110221222 is a `hidden beast` number, since 2 + 211 + 10 + 221 + 222 = 666.

It is a super-3 number, since 3×221110221222³ (a number of 35 digits) contains 333 as substring.

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 = 221110221195 and 221110221204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 558358947 + ... + 558359342.

It is an arithmetic number, because the mean of its divisors is an integer number (21776006655).

Almost surely, 2^221110221222 is an apocalyptic number.

221110221222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221110221222 is an abundant number, since it is smaller than the sum of its proper divisors (301513938498).

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

221110221222 is a wasteful number, since it uses less digits than its factorization.

221110221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116718308 (or 1116718305 counting only the distinct ones).

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

Adding to 221110221222 its reverse (222122011122), we get a palindrome (443232232344).

The spelling of 221110221222 in words is "two hundred twenty-one billion, one hundred ten million, two hundred twenty-one thousand, two hundred twenty-two".