21122003230200 has 144 divisors (see below), whose sum is σ = 70952472110520. Its totient is φ = 5631125195520.

The previous prime is 21122003230187. The next prime is 21122003230201. The reversal of 21122003230200 is 203230022112.

21122003230200 is a `hidden beast` number, since 2 + 11 + 220 + 0 + 3 + 230 + 200 = 666.

It is a super-2 number, since 2×21122003230200² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122003230201) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5739694 + ... + 8671106.

Almost surely, 2^{21122003230200} is an apocalyptic number.

21122003230200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21122003230200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35476236055260).

21122003230200 is an abundant number, since it is smaller than the sum of its proper divisors (49830468880320).

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

21122003230200 is a wasteful number, since it uses less digits than its factorization.

21122003230200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2935438 (or 2935426 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21122003230200 its reverse (203230022112), we get a palindrome (21325233252312).

The spelling of 21122003230200 in words is "twenty-one trillion, one hundred twenty-two billion, three million, two hundred thirty thousand, two hundred".