21200201222 has 4 divisors (see below), whose sum is σ = 31800301836. Its totient is φ = 10600100610.

The previous prime is 21200201221. The next prime is 21200201227. The reversal of 21200201222 is 22210200212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21200201197 and 21200201206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200201221) by changing a digit.

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 as a sum of consecutive naturals, namely, 5300050304 + ... + 5300050307.

It is an arithmetic number, because the mean of its divisors is an integer number (7950075459).

Almost surely, 2^21200201222 is an apocalyptic number.

21200201222 is a deficient number, since it is larger than the sum of its proper divisors (10600100614).

21200201222 is a wasteful number, since it uses less digits than its factorization.

21200201222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10600100613.

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

Adding to 21200201222 its reverse (22210200212), we get a palindrome (43410401434).

The spelling of 21200201222 in words is "twenty-one billion, two hundred million, two hundred one thousand, two hundred twenty-two".