10000020020021 has 16 divisors (see below), whose sum is σ = 10680774451200. Its totient is φ = 9335186188848.

The previous prime is 10000020019993. The next prime is 10000020020027. The reversal of 10000020020021 is 12002002000001.

It is a cyclic number.

It is not a de Polignac number, because 10000020020021 - 2¹⁰ = 10000020018997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10000020019990 and 10000020020008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10000020020027) 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, 5867501 + ... + 7377506.

It is an arithmetic number, because the mean of its divisors is an integer number (667548403200).

Almost surely, 2^{10000020020021} is an apocalyptic number.

It is an amenable number.

10000020020021 is a deficient number, since it is larger than the sum of its proper divisors (680754431179).

10000020020021 is a wasteful number, since it uses less digits than its factorization.

10000020020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13245608.

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

Adding to 10000020020021 its reverse (12002002000001), we get a palindrome (22002022020022).

The spelling of 10000020020021 in words is "ten trillion, twenty million, twenty thousand, twenty-one".