12210312020121 has 80 divisors (see below), whose sum is σ = 19529907038400. Its totient is φ = 7579367137152.

The previous prime is 12210312020111. The next prime is 12210312020147. The reversal of 12210312020121 is 12102021301221.

12210312020121 is a `hidden beast` number, since 1 + 2 + 210 + 312 + 0 + 20 + 121 = 666.

It is not a de Polignac number, because 12210312020121 - 2⁵ = 12210312020089 is a prime.

It is a super-2 number, since 2×12210312020121² (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 = 12210312020094 and 12210312020103.

It is not an unprimeable number, because it can be changed into a prime (12210312020111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 493672671 + ... + 493697403.

It is an arithmetic number, because the mean of its divisors is an integer number (244123837980).

Almost surely, 2^{12210312020121} is an apocalyptic number.

It is an amenable number.

12210312020121 is a deficient number, since it is larger than the sum of its proper divisors (7319595018279).

12210312020121 is a wasteful number, since it uses less digits than its factorization.

12210312020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30260 (or 30251 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 12210312020121 its reverse (12102021301221), we get a palindrome (24312333321342).

The spelling of 12210312020121 in words is "twelve trillion, two hundred ten billion, three hundred twelve million, twenty thousand, one hundred twenty-one".