21210200002000 has 40 divisors (see below), whose sum is σ = 51286263609672. Its totient is φ = 8484080000000.

The previous prime is 21210200001919. The next prime is 21210200002021. The reversal of 21210200002000 is 20000201212.

It can be written as a sum of positive squares in 4 ways, for example, as 840720280464 + 20369479721536 = 916908^2 + 4513256^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×21210200002000³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5302548001 + ... + 5302552000.

Almost surely, 2^{21210200002000} is an apocalyptic number.

21210200002000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21210200002000 is an abundant number, since it is smaller than the sum of its proper divisors (30076063607672).

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

21210200002000 is a wasteful number, since it uses less digits than its factorization.

21210200002000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10605100024 (or 10605100008 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21210200002000 its reverse (20000201212), we get a palindrome (21230200203212).

The spelling of 21210200002000 in words is "twenty-one trillion, two hundred ten billion, two hundred million, two thousand".