21330020102021 has 16 divisors (see below), whose sum is σ = 21508259011200. Its totient is φ = 21152273415360.

The previous prime is 21330020102009. The next prime is 21330020102051. The reversal of 21330020102021 is 12020102003312.

It is a cyclic number.

It is not a de Polignac number, because 21330020102021 - 2³⁴ = 21312840232837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330020102051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267854591 + ... + 267934211.

It is an arithmetic number, because the mean of its divisors is an integer number (1344266188200).

Almost surely, 2^{21330020102021} is an apocalyptic number.

It is an amenable number.

21330020102021 is a deficient number, since it is larger than the sum of its proper divisors (178238909179).

21330020102021 is a wasteful number, since it uses less digits than its factorization.

21330020102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82684.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21330020102021 its reverse (12020102003312), we get a palindrome (33350122105333).

The spelling of 21330020102021 in words is "twenty-one trillion, three hundred thirty billion, twenty million, one hundred two thousand, twenty-one".