21200211212 has 12 divisors (see below), whose sum is σ = 37153299456. Its totient is φ = 10584982800.

The previous prime is 21200211203. The next prime is 21200211239. The reversal of 21200211212 is 21211200212.

It is a super-3 number, since 3×21200211212³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3777548 + ... + 3783155.

It is an arithmetic number, because the mean of its divisors is an integer number (3096108288).

Almost surely, 2^21200211212 is an apocalyptic number.

It is an amenable number.

21200211212 is a deficient number, since it is larger than the sum of its proper divisors (15953088244).

21200211212 is a wasteful number, since it uses less digits than its factorization.

21200211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7561408 (or 7561406 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21200211212 its reverse (21211200212), we get a palindrome (42411411424).

The spelling of 21200211212 in words is "twenty-one billion, two hundred million, two hundred eleven thousand, two hundred twelve".