201020022021121 has 12 divisors (see below), whose sum is σ = 219932170771716. Its totient is φ = 183092240156160.

The previous prime is 201020022021103. The next prime is 201020022021151. The reversal of 201020022021121 is 121120220020102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 144911517926400 + 56108504094721 = 12037920^2 + 7490561^2 .

It is not a de Polignac number, because 201020022021121 - 2²⁷ = 201019887803393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201020022021095 and 201020022021104.

It is not an unprimeable number, because it can be changed into a prime (201020022021101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6152276680 + ... + 6152309353.

It is an arithmetic number, because the mean of its divisors is an integer number (18327680897643).

Almost surely, 2^{201020022021121} is an apocalyptic number.

It is an amenable number.

201020022021121 is a deficient number, since it is larger than the sum of its proper divisors (18912148750595).

201020022021121 is a wasteful number, since it uses less digits than its factorization.

201020022021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12304586112 (or 12304586081 counting only the distinct ones).

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

Adding to 201020022021121 its reverse (121120220020102), we get a palindrome (322140242041223).

The spelling of 201020022021121 in words is "two hundred one trillion, twenty billion, twenty-two million, twenty-one thousand, one hundred twenty-one".