21100221022112 has 24 divisors (see below), whose sum is σ = 41770568768292. Its totient is φ = 10491822604800.

The previous prime is 21100221022103. The next prime is 21100221022157. The reversal of 21100221022112 is 21122012200112.

It can be written as a sum of positive squares in 2 ways, for example, as 12802341617296 + 8297879404816 = 3578036^2 + 2880604^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 1821491189 + ... + 1821502772.

Almost surely, 2^{21100221022112} is an apocalyptic number.

It is an amenable number.

21100221022112 is a deficient number, since it is larger than the sum of its proper divisors (20670347746180).

21100221022112 is a wasteful number, since it uses less digits than its factorization.

21100221022112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3642994152 (or 3642994144 counting only the distinct ones).

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

Adding to 21100221022112 its reverse (21122012200112), we get a palindrome (42222233222224).

The spelling of 21100221022112 in words is "twenty-one trillion, one hundred billion, two hundred twenty-one million, twenty-two thousand, one hundred twelve".