22221812222 has 4 divisors (see below), whose sum is σ = 33332718336. Its totient is φ = 11110906110.

The previous prime is 22221812219. The next prime is 22221812231.

22221812222 is nontrivially palindromic in base 10.

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 = 22221812191 and 22221812200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555453054 + ... + 5555453057.

It is an arithmetic number, because the mean of its divisors is an integer number (8333179584).

Almost surely, 2^22221812222 is an apocalyptic number.

22221812222 is a deficient number, since it is larger than the sum of its proper divisors (11110906114).

22221812222 is a wasteful number, since it uses less digits than its factorization.

22221812222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11110906113.

The product of its digits is 2048, while the sum is 26.

The spelling of 22221812222 in words is "twenty-two billion, two hundred twenty-one million, eight hundred twelve thousand, two hundred twenty-two".