21200001201212 has 12 divisors (see below), whose sum is σ = 37100047571160. Its totient is φ = 10599987609456.

The previous prime is 21200001201173. The next prime is 21200001201241. The reversal of 21200001201212 is 21210210000212.

It is a congruent number.

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, 1058303 + ... + 6596969.

It is an arithmetic number, because the mean of its divisors is an integer number (3091670630930).

Almost surely, 2^{21200001201212} is an apocalyptic number.

It is an amenable number.

21200001201212 is a deficient number, since it is larger than the sum of its proper divisors (15900046369948).

21200001201212 is a wasteful number, since it uses less digits than its factorization.

21200001201212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6495580 (or 6495578 counting only the distinct ones).

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

Adding to 21200001201212 its reverse (21210210000212), we get a palindrome (42410211201424).

The spelling of 21200001201212 in words is "twenty-one trillion, two hundred billion, one million, two hundred one thousand, two hundred twelve".