12210120310021 has 4 divisors (see below), whose sum is σ = 12210505264044. Its totient is φ = 12209735356000.

The previous prime is 12210120310019. The next prime is 12210120310127. The reversal of 12210120310021 is 12001302101221.

12210120310021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1684183613121 + 10525936696900 = 1297761^2 + 3244370^2 .

It is a cyclic number.

It is not a de Polignac number, because 12210120310021 - 2¹ = 12210120310019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12210120309977 and 12210120310004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210120310721) 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, 192429430 + ... + 192492871.

It is an arithmetic number, because the mean of its divisors is an integer number (3052626316011).

Almost surely, 2^{12210120310021} is an apocalyptic number.

It is an amenable number.

12210120310021 is a deficient number, since it is larger than the sum of its proper divisors (384954023).

12210120310021 is an equidigital number, since it uses as much as digits as its factorization.

12210120310021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384954022.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12210120310021 its reverse (12001302101221), we get a palindrome (24211422411242).

The spelling of 12210120310021 in words is "twelve trillion, two hundred ten billion, one hundred twenty million, three hundred ten thousand, twenty-one".