21002200100012 has 12 divisors (see below), whose sum is σ = 36754933414920. Its totient is φ = 10500790552896.

The previous prime is 21002200100003. The next prime is 21002200100023. The reversal of 21002200100012 is 21000100220012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21002200099966 and 21002200100002.

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, 77221562 + ... + 77493057.

It is an arithmetic number, because the mean of its divisors is an integer number (3062911117910).

Almost surely, 2^{21002200100012} is an apocalyptic number.

It is an amenable number.

21002200100012 is a deficient number, since it is larger than the sum of its proper divisors (15752733314908).

21002200100012 is a wasteful number, since it uses less digits than its factorization.

21002200100012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154748560 (or 154748558 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21002200100012 its reverse (21000100220012), we get a palindrome (42002300320024).

The spelling of 21002200100012 in words is "twenty-one trillion, two billion, two hundred million, one hundred thousand, twelve".