21222210200 has 48 divisors (see below), whose sum is σ = 49896081000. Its totient is φ = 8393496320.

The previous prime is 21222210197. The next prime is 21222210221. The reversal of 21222210200 is 201222212.

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 11 ways as a sum of consecutive naturals, for example, 578330 + ... + 613929.

Almost surely, 2^21222210200 is an apocalyptic number.

21222210200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222210200 is an abundant number, since it is smaller than the sum of its proper divisors (28673870800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21222210200 is a wasteful number, since it uses less digits than its factorization.

21222210200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192364 (or 1192355 counting only the distinct ones).

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

Adding to 21222210200 its reverse (201222212), we get a palindrome (21423432412).

The spelling of 21222210200 in words is "twenty-one billion, two hundred twenty-two million, two hundred ten thousand, two hundred".