20002021000221 has 16 divisors (see below), whose sum is σ = 28989269838144. Its totient is φ = 12193899212544.

The previous prime is 20002021000147. The next prime is 20002021000243. The reversal of 20002021000221 is 12200012020002.

It is not a de Polignac number, because 20002021000221 - 2¹⁴ = 20002020983837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20002021000197 and 20002021000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002021000261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2396595516 + ... + 2396603861.

It is an arithmetic number, because the mean of its divisors is an integer number (1811829364884).

Almost surely, 2^{20002021000221} is an apocalyptic number.

It is an amenable number.

20002021000221 is a deficient number, since it is larger than the sum of its proper divisors (8987248837923).

20002021000221 is a wasteful number, since it uses less digits than its factorization.

20002021000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4793199500.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20002021000221 its reverse (12200012020002), we get a palindrome (32202033020223).

The spelling of 20002021000221 in words is "twenty trillion, two billion, twenty-one million, two hundred twenty-one", and thus it is an aban number.