201020020012121 has 4 divisors (see below), whose sum is σ = 201020094903312. Its totient is φ = 201019945120932.

The previous prime is 201020020012079. The next prime is 201020020012127. The reversal of 201020020012121 is 121210020020102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201020020012121 - 2³⁰ = 201018946270297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201020020012096 and 201020020012105.

It is not an unprimeable number, because it can be changed into a prime (201020020012127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33263675 + ... + 38839568.

It is an arithmetic number, because the mean of its divisors is an integer number (50255023725828).

Almost surely, 2^{201020020012121} is an apocalyptic number.

It is an amenable number.

201020020012121 is a deficient number, since it is larger than the sum of its proper divisors (74891191).

201020020012121 is an equidigital number, since it uses as much as digits as its factorization.

201020020012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74891190.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201020020012121 its reverse (121210020020102), we get a palindrome (322230040032223).

The spelling of 201020020012121 in words is "two hundred one trillion, twenty billion, twenty million, twelve thousand, one hundred twenty-one".