121212210020121 has 24 divisors (see below), whose sum is σ = 201053745491040. Its totient is φ = 69595527283200.

The previous prime is 121212210020093. The next prime is 121212210020171. The reversal of 121212210020121 is 121020012212121.

121212210020121 is a `hidden beast` number, since 1 + 21 + 212 + 210 + 0 + 201 + 21 = 666.

It is not a de Polignac number, because 121212210020121 - 2¹³ = 121212210011929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121212210020094 and 121212210020103.

It is not an unprimeable number, because it can be changed into a prime (121212210020171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32220149640 + ... + 32220153401.

It is an arithmetic number, because the mean of its divisors is an integer number (8377239395460).

Almost surely, 2^{121212210020121} is an apocalyptic number.

121212210020121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121212210020121 is a deficient number, since it is larger than the sum of its proper divisors (79841535470919).

121212210020121 is a wasteful number, since it uses less digits than its factorization.

121212210020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64440303077 (or 64440303074 counting only the distinct ones).

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

Adding to 121212210020121 its reverse (121020012212121), we get a palindrome (242232222232242).

The spelling of 121212210020121 in words is "one hundred twenty-one trillion, two hundred twelve billion, two hundred ten million, twenty thousand, one hundred twenty-one".