21202200212 has 12 divisors (see below), whose sum is σ = 37464082656. Its totient is φ = 10498176600.

The previous prime is 21202200197. The next prime is 21202200247. The reversal of 21202200212 is 21200220212.

It is a congruent number.

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, 25730414 + ... + 25731237.

It is an arithmetic number, because the mean of its divisors is an integer number (3122006888).

Almost surely, 2^21202200212 is an apocalyptic number.

It is an amenable number.

21202200212 is a deficient number, since it is larger than the sum of its proper divisors (16261882444).

21202200212 is a wasteful number, since it uses less digits than its factorization.

21202200212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51461758 (or 51461756 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21202200212 its reverse (21200220212), we get a palindrome (42402420424).

The spelling of 21202200212 in words is "twenty-one billion, two hundred two million, two hundred thousand, two hundred twelve".