20212013220021 has 16 divisors (see below), whose sum is σ = 34221398044800. Its totient is φ = 11549721839904.

The previous prime is 20212013220001. The next prime is 20212013220067. The reversal of 20212013220021 is 12002231021202.

20212013220021 is a `hidden beast` number, since 202 + 120 + 1 + 322 + 0 + 0 + 21 = 666.

It is not a de Polignac number, because 20212013220021 - 2¹⁰ = 20212013218997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20212013219976 and 20212013220003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212013220001) 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 15 ways as a sum of consecutive naturals, for example, 53470934256 + ... + 53470934633.

It is an arithmetic number, because the mean of its divisors is an integer number (2138837377800).

Almost surely, 2^{20212013220021} is an apocalyptic number.

20212013220021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20212013220021 is a deficient number, since it is larger than the sum of its proper divisors (14009384824779).

20212013220021 is a wasteful number, since it uses less digits than its factorization.

20212013220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106941868905 (or 106941868899 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20212013220021 its reverse (12002231021202), we get a palindrome (32214244241223).

The spelling of 20212013220021 in words is "twenty trillion, two hundred twelve billion, thirteen million, two hundred twenty thousand, twenty-one".