22012112222 has 4 divisors (see below), whose sum is σ = 33018168336. Its totient is φ = 11006056110.

The previous prime is 22012112209. The next prime is 22012112249. The reversal of 22012112222 is 22221121022.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 22012112222.

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, 5503028054 + ... + 5503028057.

It is an arithmetic number, because the mean of its divisors is an integer number (8254542084).

Almost surely, 2^22012112222 is an apocalyptic number.

22012112222 is a deficient number, since it is larger than the sum of its proper divisors (11006056114).

22012112222 is a wasteful number, since it uses less digits than its factorization.

22012112222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11006056113.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22012112222 its reverse (22221121022), we get a palindrome (44233233244).

The spelling of 22012112222 in words is "twenty-two billion, twelve million, one hundred twelve thousand, two hundred twenty-two".