201210202110121 has 4 divisors (see below), whose sum is σ = 201518334120132. Its totient is φ = 200902070100112.

The previous prime is 201210202110089. The next prime is 201210202110139. The reversal of 201210202110121 is 121011202012102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12970045946025 + 188240156164096 = 3601395^2 + 13720064^2 .

It is a cyclic number.

It is not a de Polignac number, because 201210202110121 - 2⁵ = 201210202110089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201210202110095 and 201210202110104.

It is not an unprimeable number, because it can be changed into a prime (201210202810121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154066004026 + ... + 154066005331.

It is an arithmetic number, because the mean of its divisors is an integer number (50379583530033).

Almost surely, 2^{201210202110121} is an apocalyptic number.

It is an amenable number.

201210202110121 is a deficient number, since it is larger than the sum of its proper divisors (308132010011).

201210202110121 is an equidigital number, since it uses as much as digits as its factorization.

201210202110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308132010010.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201210202110121 its reverse (121011202012102), we get a palindrome (322221404122223).

The spelling of 201210202110121 in words is "two hundred one trillion, two hundred ten billion, two hundred two million, one hundred ten thousand, one hundred twenty-one".