201020012101 has 4 divisors (see below), whose sum is σ = 204812842572. Its totient is φ = 197227181632.

The previous prime is 201020012099. The next prime is 201020012117. The reversal of 201020012101 is 101210020102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101210020102 = 2 ⋅50605010051.

It can be written as a sum of positive squares in 2 ways, for example, as 70370295076 + 130649717025 = 265274^2 + 361455^2 .

It is a cyclic number.

It is not a de Polignac number, because 201020012101 - 2¹ = 201020012099 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 (201020012191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1896415156 + ... + 1896415261.

It is an arithmetic number, because the mean of its divisors is an integer number (51203210643).

Almost surely, 2^201020012101 is an apocalyptic number.

It is an amenable number.

201020012101 is a deficient number, since it is larger than the sum of its proper divisors (3792830471).

201020012101 is an equidigital number, since it uses as much as digits as its factorization.

201020012101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3792830470.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 201020012101 its reverse (101210020102), we get a palindrome (302230032203).

The spelling of 201020012101 in words is "two hundred one billion, twenty million, twelve thousand, one hundred one".