22211122212012 has 12 divisors (see below), whose sum is σ = 51825951828056. Its totient is φ = 7403707404000.

The previous prime is 22211122212007. The next prime is 22211122212061. The reversal of 22211122212012 is 21021222111222.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 22211122212012.

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, 925463425489 + ... + 925463425512.

Almost surely, 2^{22211122212012} is an apocalyptic number.

It is an amenable number.

22211122212012 is an abundant number, since it is smaller than the sum of its proper divisors (29614829616044).

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

22211122212012 is a wasteful number, since it uses less digits than its factorization.

22211122212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850926851008 (or 1850926851006 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 22211122212012 its reverse (21021222111222), we get a palindrome (43232344323234).

The spelling of 22211122212012 in words is "twenty-two trillion, two hundred eleven billion, one hundred twenty-two million, two hundred twelve thousand, twelve".