201020112110121 has 16 divisors (see below), whose sum is σ = 269089092534528. Its totient is φ = 133482344960000.

The previous prime is 201020112110053. The next prime is 201020112110141. The reversal of 201020112110121 is 121011211020102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 201020112110121 - 2¹³ = 201020112101929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201020112110121.

It is not an unprimeable number, because it can be changed into a prime (201020112110141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1339696 + ... + 20095646.

It is an arithmetic number, because the mean of its divisors is an integer number (16818068283408).

Almost surely, 2^{201020112110121} is an apocalyptic number.

It is an amenable number.

201020112110121 is a deficient number, since it is larger than the sum of its proper divisors (68068980424407).

201020112110121 is a wasteful number, since it uses less digits than its factorization.

201020112110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18770112.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 201020112110121 its reverse (121011211020102), we get a palindrome (322031323130223).

The spelling of 201020112110121 in words is "two hundred one trillion, twenty billion, one hundred twelve million, one hundred ten thousand, one hundred twenty-one".