210021002000000 has 448 divisors, whose sum is σ = 532827632844000. Its totient is φ = 82434240000000.

The previous prime is 210021001999937. The next prime is 210021002000021. The reversal of 210021002000000 is 200120012.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 82717998731 + ... + 82718001269.

Almost surely, 2^{210021002000000} is an apocalyptic number.

210021002000000 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 210021002000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266413816422000).

210021002000000 is an abundant number, since it is smaller than the sum of its proper divisors (322806630844000).

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

210021002000000 is an frugal number, since it uses more digits than its factorization.

210021002000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3343 (or 3306 counting only the distinct ones).

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

Adding to 210021002000000 its reverse (200120012), we get a palindrome (210021202120012).

The spelling of 210021002000000 in words is "two hundred ten trillion, twenty-one billion, two million", and thus it is an aban number.