12021022210121 has 4 divisors (see below), whose sum is σ = 12041293749012. Its totient is φ = 12000750671232.

The previous prime is 12021022210111. The next prime is 12021022210123. The reversal of 12021022210121 is 12101222012021.

12021022210121 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 6818809351225 + 5202212858896 = 2611285^2 + 2280836^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021022210121 - 2¹⁴ = 12021022193737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12021022210121.

It is not an unprimeable number, because it can be changed into a prime (12021022210123) 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, 10135768556 + ... + 10135769741.

It is an arithmetic number, because the mean of its divisors is an integer number (3010323437253).

Almost surely, 2^{12021022210121} is an apocalyptic number.

It is an amenable number.

12021022210121 is a deficient number, since it is larger than the sum of its proper divisors (20271538891).

12021022210121 is an equidigital number, since it uses as much as digits as its factorization.

12021022210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20271538890.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12021022210121 its reverse (12101222012021), we get a palindrome (24122244222142).

The spelling of 12021022210121 in words is "twelve trillion, twenty-one billion, twenty-two million, two hundred ten thousand, one hundred twenty-one".