21123222342200 has 192 divisors, whose sum is σ = 57095058539520. Its totient is φ = 7190883392000.

The previous prime is 21123222342199. The next prime is 21123222342221. The reversal of 21123222342200 is 224322232112.

It is a self number, because there is not a number n which added to its sum of digits gives 21123222342200.

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 47 ways as a sum of consecutive naturals, for example, 2062811 + ... + 6819210.

It is an arithmetic number, because the mean of its divisors is an integer number (297370096560).

Almost surely, 2^{21123222342200} is an apocalyptic number.

21123222342200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21123222342200 is an abundant number, since it is smaller than the sum of its proper divisors (35971836197320).

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

21123222342200 is a wasteful number, since it uses less digits than its factorization.

21123222342200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8882118 (or 8882109 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21123222342200 its reverse (224322232112), we get a palindrome (21347544574312).

The spelling of 21123222342200 in words is "twenty-one trillion, one hundred twenty-three billion, two hundred twenty-two million, three hundred forty-two thousand, two hundred".