201021210220111 has 16 divisors (see below), whose sum is σ = 208685364451200. Its totient is φ = 193406931150048.

The previous prime is 201021210220087. The next prime is 201021210220133. The reversal of 201021210220111 is 111022012120102.

It is a cyclic number.

It is not a de Polignac number, because 201021210220111 - 2¹¹ = 201021210218063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201021210290111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1361500 + ... + 20097166.

It is an arithmetic number, because the mean of its divisors is an integer number (13042835278200).

Almost surely, 2^{201021210220111} is an apocalyptic number.

201021210220111 is a deficient number, since it is larger than the sum of its proper divisors (7664154231089).

201021210220111 is a wasteful number, since it uses less digits than its factorization.

201021210220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18736998.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201021210220111 its reverse (111022012120102), we get a palindrome (312043222340213).

The spelling of 201021210220111 in words is "two hundred one trillion, twenty-one billion, two hundred ten million, two hundred twenty thousand, one hundred eleven".