21210321330000 has 600 divisors, whose sum is σ = 80954024744736. Its totient is φ = 5139657600000.

The previous prime is 21210321329917. The next prime is 21210321330061. The reversal of 21210321330000 is 3312301212.

21210321330000 is a `hidden beast` number, since 2 + 1 + 2 + 10 + 321 + 330 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (600).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 4050087382 + ... + 4050092618.

Almost surely, 2^{21210321330000} is an apocalyptic number.

21210321330000 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 21210321330000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40477012372368).

21210321330000 is an abundant number, since it is smaller than the sum of its proper divisors (59743703414736).

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

21210321330000 is a wasteful number, since it uses less digits than its factorization.

21210321330000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9373 (or 9349 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21210321330000 its reverse (3312301212), we get a palindrome (21213633631212).

The spelling of 21210321330000 in words is "twenty-one trillion, two hundred ten billion, three hundred twenty-one million, three hundred thirty thousand".