2121212201121 has 12 divisors (see below), whose sum is σ = 3299663424148. Its totient is φ = 1305361354464.

The previous prime is 2121212201047. The next prime is 2121212201123. The reversal of 2121212201121 is 1211022121212.

2121212201121 is a `hidden beast` number, since 212 + 121 + 220 + 112 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 712091261025 + 1409120940096 = 843855^2 + 1187064^2 .

It is not a de Polignac number, because 2121212201121 - 2⁹ = 2121212200609 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2121212201094 and 2121212201103.

It is not an unprimeable number, because it can be changed into a prime (2121212201123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9065009290 + ... + 9065009523.

Almost surely, 2^{2121212201121} is an apocalyptic number.

It is an amenable number.

2121212201121 is a deficient number, since it is larger than the sum of its proper divisors (1178451223027).

2121212201121 is a wasteful number, since it uses less digits than its factorization.

2121212201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18130018832 (or 18130018829 counting only the distinct ones).

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

Adding to 2121212201121 its reverse (1211022121212), we get a palindrome (3332234322333).

The spelling of 2121212201121 in words is "two trillion, one hundred twenty-one billion, two hundred twelve million, two hundred one thousand, one hundred twenty-one".