22012223212 has 12 divisors (see below), whose sum is σ = 44024446480. Its totient is φ = 9433809936.

The previous prime is 22012223201. The next prime is 22012223221. The reversal of 22012223212 is 21232221022.

22012223212 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 22012223212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393075387 + ... + 393075442.

Almost surely, 2^22012223212 is an apocalyptic number.

It is an amenable number.

22012223212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22012223212 is a wasteful number, since it uses less digits than its factorization.

22012223212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786150840 (or 786150838 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 22012223212 its reverse (21232221022), we get a palindrome (43244444234).

The spelling of 22012223212 in words is "twenty-two billion, twelve million, two hundred twenty-three thousand, two hundred twelve".