222221021222 has 4 divisors (see below), whose sum is σ = 333331531836. Its totient is φ = 111110510610.

The previous prime is 222221021219. The next prime is 222221021227. The reversal of 222221021222 is 222120122222.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 222221021194 and 222221021203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221021227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555255304 + ... + 55555255307.

It is an arithmetic number, because the mean of its divisors is an integer number (83332882959).

Almost surely, 2^222221021222 is an apocalyptic number.

222221021222 is a deficient number, since it is larger than the sum of its proper divisors (111110510614).

222221021222 is a wasteful number, since it uses less digits than its factorization.

222221021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111110510613.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 222221021222 its reverse (222120122222), we get a palindrome (444341143444).

The spelling of 222221021222 in words is "two hundred twenty-two billion, two hundred twenty-one million, twenty-one thousand, two hundred twenty-two".