21112022012012 has 12 divisors (see below), whose sum is σ = 36947505450240. Its totient is φ = 10555591883376.

The previous prime is 21112022012009. The next prime is 21112022012021. The reversal of 21112022012012 is 21021022021112.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 104667308 + ... + 104868819.

It is an arithmetic number, because the mean of its divisors is an integer number (3078958787520).

Almost surely, 2^{21112022012012} is an apocalyptic number.

It is an amenable number.

21112022012012 is a deficient number, since it is larger than the sum of its proper divisors (15835483438228).

21112022012012 is a wasteful number, since it uses less digits than its factorization.

21112022012012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209561320 (or 209561318 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21112022012012 its reverse (21021022021112), we get a palindrome (42133044033124).

It can be divided in two parts, 2111202 and 2012012, that added together give a palindrome (4123214).

The spelling of 21112022012012 in words is "twenty-one trillion, one hundred twelve billion, twenty-two million, twelve thousand, twelve".