21052130330000 has 400 divisors, whose sum is σ = 63579743969280. Its totient is φ = 6558235200000.

The previous prime is 21052130329991. The next prime is 21052130330111. The reversal of 21052130330000 is 3303125012.

It is a tau number, because it is divible by the number of its divisors (400).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1724023895 + ... + 1724036105.

Almost surely, 2^{21052130330000} is an apocalyptic number.

21052130330000 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 21052130330000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31789871984640).

21052130330000 is an abundant number, since it is smaller than the sum of its proper divisors (42527613639280).

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

21052130330000 is a wasteful number, since it uses less digits than its factorization.

21052130330000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14496 (or 14475 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

Adding to 21052130330000 its reverse (3303125012), we get a palindrome (21055433455012).

The spelling of 21052130330000 in words is "twenty-one trillion, fifty-two billion, one hundred thirty million, three hundred thirty thousand".