21210110210000 has 200 divisors, whose sum is σ = 54611834618880. Its totient is φ = 7954647552000.

The previous prime is 21210110209993. The next prime is 21210110210027. The reversal of 21210110210000 is 1201101212.

It is a tau number, because it is divible by the number of its divisors (200).

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 39 ways as a sum of consecutive naturals, for example, 17854577 + ... + 19005423.

Almost surely, 2^{21210110210000} is an apocalyptic number.

21210110210000 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 21210110210000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27305917309440).

21210110210000 is an abundant number, since it is smaller than the sum of its proper divisors (33401724408880).

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

21210110210000 is a wasteful number, since it uses less digits than its factorization.

21210110210000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150991 (or 1150970 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21210110210000 its reverse (1201101212), we get a palindrome (21211311311212).

The spelling of 21210110210000 in words is "twenty-one trillion, two hundred ten billion, one hundred ten million, two hundred ten thousand".