21203320210200 has 144 divisors (see below), whose sum is σ = 74303809229520. Its totient is φ = 5408383115520.

The previous prime is 21203320210199. The next prime is 21203320210201. The reversal of 21203320210200 is 201202330212.

21203320210200 is a `hidden beast` number, since 2 + 120 + 3 + 320 + 21 + 0 + 200 = 666.

It is an interprime number because it is at equal distance from previous prime (21203320210199) and next prime (21203320210201).

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 (21203320210201) 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, 256037347 + ... + 256120146.

It is an arithmetic number, because the mean of its divisors is an integer number (515998675205).

Almost surely, 2^{21203320210200} is an apocalyptic number.

21203320210200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21203320210200 is an abundant number, since it is smaller than the sum of its proper divisors (53100489019320).

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

21203320210200 is a wasteful number, since it uses less digits than its factorization.

21203320210200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512157538 (or 512157526 counting only the distinct ones).

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

Adding to 21203320210200 its reverse (201202330212), we get a palindrome (21404522540412).

The spelling of 21203320210200 in words is "twenty-one trillion, two hundred three billion, three hundred twenty million, two hundred ten thousand, two hundred".