222110121222 has 80 divisors (see below), whose sum is σ = 547741090512. Its totient is φ = 66710407680.

The previous prime is 222110121221. The next prime is 222110121229. The reversal of 222110121222 is 222121011222.

It is a happy number.

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 = 222110121195 and 222110121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222110121221) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 350143 + ... + 752874.

Almost surely, 2^222110121222 is an apocalyptic number.

222110121222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

222110121222 is an abundant number, since it is smaller than the sum of its proper divisors (325630969290).

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

222110121222 is a wasteful number, since it uses less digits than its factorization.

222110121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103155 (or 1103146 counting only the distinct ones).

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

Adding to 222110121222 its reverse (222121011222), we get a palindrome (444231132444).

Subtracting 222110121222 from its reverse (222121011222), we obtain a square (10890000 = 3300²).

The spelling of 222110121222 in words is "two hundred twenty-two billion, one hundred ten million, one hundred twenty-one thousand, two hundred twenty-two".