201021220020211 has 32 divisors (see below), whose sum is σ = 212241641302656. Its totient is φ = 190015098240000.

The previous prime is 201021220020193. The next prime is 201021220020277. The reversal of 201021220020211 is 112020022120102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 201021220020211 - 2²¹ = 201021217923059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201021220020011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2601807321 + ... + 2601884581.

It is an arithmetic number, because the mean of its divisors is an integer number (6632551290708).

Almost surely, 2^{201021220020211} is an apocalyptic number.

201021220020211 is a deficient number, since it is larger than the sum of its proper divisors (11220421282445).

201021220020211 is a wasteful number, since it uses less digits than its factorization.

201021220020211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79503.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201021220020211 its reverse (112020022120102), we get a palindrome (313041242140313).

The spelling of 201021220020211 in words is "two hundred one trillion, twenty-one billion, two hundred twenty million, twenty thousand, two hundred eleven".