20201011210021 has 32 divisors (see below), whose sum is σ = 21026729560320. Its totient is φ = 19384369804800.

The previous prime is 20201011210013. The next prime is 20201011210087. The reversal of 20201011210021 is 12001211010202.

It is a cyclic number.

It is not a de Polignac number, because 20201011210021 - 2³ = 20201011210013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201011209983 and 20201011210010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201011210001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4937913186 + ... + 4937917276.

It is an arithmetic number, because the mean of its divisors is an integer number (657085298760).

Almost surely, 2^{20201011210021} is an apocalyptic number.

It is an amenable number.

20201011210021 is a deficient number, since it is larger than the sum of its proper divisors (825718350299).

20201011210021 is a wasteful number, since it uses less digits than its factorization.

20201011210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5917.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20201011210021 its reverse (12001211010202), we get a palindrome (32202222220223).

The spelling of 20201011210021 in words is "twenty trillion, two hundred one billion, eleven million, two hundred ten thousand, twenty-one".