201220112211021 has 24 divisors (see below), whose sum is σ = 292620312391680. Its totient is φ = 133239210266016.

The previous prime is 201220112210921. The next prime is 201220112211047. The reversal of 201220112211021 is 120112211022102.

201220112211021 is a `hidden beast` number, since 201 + 220 + 1 + 1 + 221 + 1 + 0 + 21 = 666.

201220112211021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 201220112211021 - 2³⁸ = 200945234304077 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201220112210985 and 201220112211003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220112211071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50415030 + ... + 54259703.

It is an arithmetic number, because the mean of its divisors is an integer number (12192513016320).

Almost surely, 2^{201220112211021} is an apocalyptic number.

It is an amenable number.

201220112211021 is a deficient number, since it is larger than the sum of its proper divisors (91400200180659).

201220112211021 is a wasteful number, since it uses less digits than its factorization.

201220112211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104676185 (or 104676182 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 201220112211021 its reverse (120112211022102), we get a palindrome (321332323233123).

The spelling of 201220112211021 in words is "two hundred one trillion, two hundred twenty billion, one hundred twelve million, two hundred eleven thousand, twenty-one".