201021002200021 has 2 divisors, whose sum is σ = 201021002200022. Its totient is φ = 201021002200020.

The previous prime is 201021002199971. The next prime is 201021002200061. The reversal of 201021002200021 is 120002200120102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164396888410225 + 36624113789796 = 12821735^2 + 6051786^2 .

It is a cyclic number.

It is not a de Polignac number, because 201021002200021 - 2¹³ = 201021002191829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201021002199974 and 201021002200010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201021002200061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510501100010 + 100510501100011.

It is an arithmetic number, because the mean of its divisors is an integer number (100510501100011).

Almost surely, 2^{201021002200021} is an apocalyptic number.

It is an amenable number.

201021002200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

201021002200021 is an equidigital number, since it uses as much as digits as its factorization.

201021002200021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 201021002200021 its reverse (120002200120102), we get a palindrome (321023202320123).

The spelling of 201021002200021 in words is "two hundred one trillion, twenty-one billion, two million, two hundred thousand, twenty-one".