12122012201121 has 6 divisors (see below), whose sum is σ = 17509573179410. Its totient is φ = 8081341467408.

The previous prime is 12122012201111. The next prime is 12122012201153. The reversal of 12122012201121 is 12110221022121.

12122012201121 is a `hidden beast` number, since 1 + 212 + 201 + 220 + 11 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12120320030625 + 1692170496 = 3481425^2 + 41136^2 .

It is not a de Polignac number, because 12122012201121 - 2¹³ = 12122012192929 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12122012201094 and 12122012201103.

It is not an unprimeable number, because it can be changed into a prime (12122012201111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 673445122276 + ... + 673445122293.

Almost surely, 2^{12122012201121} is an apocalyptic number.

It is an amenable number.

12122012201121 is a deficient number, since it is larger than the sum of its proper divisors (5387560978289).

12122012201121 is a wasteful number, since it uses less digits than its factorization.

12122012201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346890244575 (or 1346890244572 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12122012201121 its reverse (12110221022121), we get a palindrome (24232233223242).

The spelling of 12122012201121 in words is "twelve trillion, one hundred twenty-two billion, twelve million, two hundred one thousand, one hundred twenty-one".