22011222212 has 12 divisors (see below), whose sum is σ = 44022444480. Its totient is φ = 9433380936.

The previous prime is 22011222197. The next prime is 22011222223. The reversal of 22011222212 is 21222211022.

It is a happy number.

22011222212 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393057512 + ... + 393057567.

It is an arithmetic number, because the mean of its divisors is an integer number (3668537040).

Almost surely, 2^22011222212 is an apocalyptic number.

It is an amenable number.

22011222212 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.

22011222212 is a wasteful number, since it uses less digits than its factorization.

22011222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786115090 (or 786115088 counting only the distinct ones).

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

Adding to 22011222212 its reverse (21222211022), we get a palindrome (43233433234).

The spelling of 22011222212 in words is "twenty-two billion, eleven million, two hundred twenty-two thousand, two hundred twelve".