21220021000200 has 96 divisors (see below), whose sum is σ = 71762252859360. Its totient is φ = 5144247513600.

The previous prime is 21220021000159. The next prime is 21220021000201. The reversal of 21220021000200 is 200012002212.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (21220021000201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1607570749 + ... + 1607583948.

It is an arithmetic number, because the mean of its divisors is an integer number (747523467285).

Almost surely, 2^{21220021000200} is an apocalyptic number.

21220021000200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21220021000200 is an abundant number, since it is smaller than the sum of its proper divisors (50542231859160).

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

21220021000200 is a wasteful number, since it uses less digits than its factorization.

21220021000200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3215154727 (or 3215154718 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21220021000200 its reverse (200012002212), we get a palindrome (21420033002412).

The spelling of 21220021000200 in words is "twenty-one trillion, two hundred twenty billion, twenty-one million, two hundred", and thus it is an aban number.