201020112222021 has 12 divisors (see below), whose sum is σ = 290674938029580. Its totient is φ = 133869152590080.

The previous prime is 201020112222011. The next prime is 201020112222043. The reversal of 201020112222021 is 120222211020102.

It is a happy number.

201020112222021 is a `hidden beast` number, since 201 + 0 + 201 + 1 + 22 + 220 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 46663093819521 + 154357018402500 = 6831039^2 + 12424050^2 .

It is not a de Polignac number, because 201020112222021 - 2¹⁴ = 201020112205637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201020112221985 and 201020112222003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201020112222011) 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, 12021287670 + ... + 12021304391.

It is an arithmetic number, because the mean of its divisors is an integer number (24222911502465).

Almost surely, 2^{201020112222021} is an apocalyptic number.

It is an amenable number.

201020112222021 is a deficient number, since it is larger than the sum of its proper divisors (89654825807559).

201020112222021 is a wasteful number, since it uses less digits than its factorization.

201020112222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24042592996 (or 24042592993 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 201020112222021 its reverse (120222211020102), we get a palindrome (321242323242123).

The spelling of 201020112222021 in words is "two hundred one trillion, twenty billion, one hundred twelve million, two hundred twenty-two thousand, twenty-one".