21322101200 has 30 divisors (see below), whose sum is σ = 51226349094. Its totient is φ = 8528840320.

The previous prime is 21322101197. The next prime is 21322101253. The reversal of 21322101200 is 210122312.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 6233418304 + 15088682896 = 78952^2 + 122836^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26652227 + ... + 26653026.

Almost surely, 2^21322101200 is an apocalyptic number.

21322101200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21322101200 is an abundant number, since it is smaller than the sum of its proper divisors (29904247894).

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

21322101200 is a wasteful number, since it uses less digits than its factorization.

21322101200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53305271 (or 53305260 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21322101200 its reverse (210122312), we get a palindrome (21532223512).

The spelling of 21322101200 in words is "twenty-one billion, three hundred twenty-two million, one hundred one thousand, two hundred".