22111122212012 has 6 divisors (see below), whose sum is σ = 38694463871028. Its totient is φ = 11055561106004.

The previous prime is 22111122211979. The next prime is 22111122212017. The reversal of 22111122212012 is 21021222111122.

It is not an unprimeable number, because it can be changed into a prime (22111122212017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2763890276498 + ... + 2763890276505.

It is an arithmetic number, because the mean of its divisors is an integer number (6449077311838).

Almost surely, 2^{22111122212012} is an apocalyptic number.

It is an amenable number.

22111122212012 is a deficient number, since it is larger than the sum of its proper divisors (16583341659016).

22111122212012 is a wasteful number, since it uses less digits than its factorization.

22111122212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5527780553007 (or 5527780553005 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 22111122212012 its reverse (21021222111122), we get a palindrome (43132344323134).

The spelling of 22111122212012 in words is "twenty-two trillion, one hundred eleven billion, one hundred twenty-two million, two hundred twelve thousand, twelve".