222102021222 has 80 divisors (see below), whose sum is σ = 514206250272. Its totient is φ = 71613884160.

The previous prime is 222102021203. The next prime is 222102021233. The reversal of 222102021222 is 222120201222.

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 = 222102021195 and 222102021204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 427438 + ... + 791774.

Almost surely, 2^222102021222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222102021222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257103125136).

222102021222 is an abundant number, since it is smaller than the sum of its proper divisors (292104229050).

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

222102021222 is a wasteful number, since it uses less digits than its factorization.

222102021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364475 (or 364466 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 222102021222 its reverse (222120201222), we get a palindrome (444222222444).

The spelling of 222102021222 in words is "two hundred twenty-two billion, one hundred two million, twenty-one thousand, two hundred twenty-two".