21200002211222 has 4 divisors (see below), whose sum is σ = 31800003316836. Its totient is φ = 10600001105610.

The previous prime is 21200002211189. The next prime is 21200002211231. The reversal of 21200002211222 is 22211220000212.

It is a happy number.

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 21200002211222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5300000552804 + ... + 5300000552807.

It is an arithmetic number, because the mean of its divisors is an integer number (7950000829209).

Almost surely, 2^{21200002211222} is an apocalyptic number.

21200002211222 is a deficient number, since it is larger than the sum of its proper divisors (10600001105614).

21200002211222 is a wasteful number, since it uses less digits than its factorization.

21200002211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10600001105613.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21200002211222 its reverse (22211220000212), we get a palindrome (43411222211434).

The spelling of 21200002211222 in words is "twenty-one trillion, two hundred billion, two million, two hundred eleven thousand, two hundred twenty-two".