21112110212012 has 6 divisors (see below), whose sum is σ = 36946192871028. Its totient is φ = 10556055106004.

The previous prime is 21112110211981. The next prime is 21112110212027. The reversal of 21112110212012 is 21021201121112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2639013776498 + ... + 2639013776505.

It is an arithmetic number, because the mean of its divisors is an integer number (6157698811838).

Almost surely, 2^{21112110212012} is an apocalyptic number.

It is an amenable number.

21112110212012 is a deficient number, since it is larger than the sum of its proper divisors (15834082659016).

21112110212012 is a wasteful number, since it uses less digits than its factorization.

21112110212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5278027553007 (or 5278027553005 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21112110212012 its reverse (21021201121112), we get a palindrome (42133311333124).

The spelling of 21112110212012 in words is "twenty-one trillion, one hundred twelve billion, one hundred ten million, two hundred twelve thousand, twelve".