12021222020121 has 6 divisors (see below), whose sum is σ = 17363987362410. Its totient is φ = 8014148013408.

The previous prime is 12021222020117. The next prime is 12021222020141. The reversal of 12021222020121 is 12102022212021.

It is a happy number.

12021222020121 is a `hidden beast` number, since 12 + 0 + 212 + 220 + 201 + 21 = 666.

12021222020121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11834040324096 + 187181696025 = 3440064^2 + 432645^2 .

It is not a de Polignac number, because 12021222020121 - 2² = 12021222020117 is a prime.

It is a super-2 number, since 2×12021222020121² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12021222020094 and 12021222020103.

It is not an unprimeable number, because it can be changed into a prime (12021222020141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 667845667776 + ... + 667845667793.

It is an arithmetic number, because the mean of its divisors is an integer number (2893997893735).

Almost surely, 2^{12021222020121} is an apocalyptic number.

It is an amenable number.

12021222020121 is a deficient number, since it is larger than the sum of its proper divisors (5342765342289).

12021222020121 is a wasteful number, since it uses less digits than its factorization.

12021222020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335691335575 (or 1335691335572 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12021222020121 its reverse (12102022212021), we get a palindrome (24123244232142).

The spelling of 12021222020121 in words is "twelve trillion, twenty-one billion, two hundred twenty-two million, twenty thousand, one hundred twenty-one".