21012102000200 has 24 divisors (see below), whose sum is σ = 48853137150930. Its totient is φ = 8404840800000.

The previous prime is 21012102000181. The next prime is 21012102000203. The reversal of 21012102000200 is 200020121012.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 19142882566564 + 1869219433636 = 4375258^2 + 1367194^2 .

It is not an unprimeable number, because it can be changed into a prime (21012102000203) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 52530254801 + ... + 52530255200.

Almost surely, 2^{21012102000200} is an apocalyptic number.

21012102000200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21012102000200 is an abundant number, since it is smaller than the sum of its proper divisors (27841035150730).

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

21012102000200 is a wasteful number, since it uses less digits than its factorization.

21012102000200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105060510017 (or 105060510008 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21012102000200 its reverse (200020121012), we get a palindrome (21212122121212).

The spelling of 21012102000200 in words is "twenty-one trillion, twelve billion, one hundred two million, two hundred", and thus it is an aban number.