22211222012 has 12 divisors (see below), whose sum is σ = 44422444080. Its totient is φ = 9519095136.

The previous prime is 22211221999. The next prime is 22211222029. The reversal of 22211222012 is 21022211222.

It is a happy number.

22211222012 is an admirable number.

It is a congruent 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, 396628937 + ... + 396628992.

It is an arithmetic number, because the mean of its divisors is an integer number (3701870340).

Almost surely, 2^22211222012 is an apocalyptic number.

It is an amenable number.

22211222012 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.

22211222012 is a wasteful number, since it uses less digits than its factorization.

22211222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793257940 (or 793257938 counting only the distinct ones).

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

Adding to 22211222012 its reverse (21022211222), we get a palindrome (43233433234).

The spelling of 22211222012 in words is "twenty-two billion, two hundred eleven million, two hundred twenty-two thousand, twelve".