21200211211222 has 4 divisors (see below), whose sum is σ = 31800316816836. Its totient is φ = 10600105605610.

The previous prime is 21200211211211. The next prime is 21200211211241. The reversal of 21200211211222 is 22211211200212.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21200211211222.

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 as a sum of consecutive naturals, namely, 5300052802804 + ... + 5300052802807.

It is an arithmetic number, because the mean of its divisors is an integer number (7950079204209).

Almost surely, 2^{21200211211222} is an apocalyptic number.

21200211211222 is a deficient number, since it is larger than the sum of its proper divisors (10600105605614).

21200211211222 is a wasteful number, since it uses less digits than its factorization.

21200211211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10600105605613.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21200211211222 its reverse (22211211200212), we get a palindrome (43411422411434).

The spelling of 21200211211222 in words is "twenty-one trillion, two hundred billion, two hundred eleven million, two hundred eleven thousand, two hundred twenty-two".