12121012021121 has 8 divisors (see below), whose sum is σ = 12141669127680. Its totient is φ = 12100372476192.

The previous prime is 12121012021081. The next prime is 12121012021163. The reversal of 12121012021121 is 12112021012121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12121012021121 - 2²⁶ = 12120944912257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12121012021121.

It is not an unprimeable number, because it can be changed into a prime (12121012023121) 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 7 ways as a sum of consecutive naturals, for example, 3008465 + ... + 5769998.

It is an arithmetic number, because the mean of its divisors is an integer number (1517708640960).

Almost surely, 2^{12121012021121} is an apocalyptic number.

It is an amenable number.

12121012021121 is a deficient number, since it is larger than the sum of its proper divisors (20657106559).

12121012021121 is a wasteful number, since it uses less digits than its factorization.

12121012021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8780815.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12121012021121 its reverse (12112021012121), we get a palindrome (24233033033242).

The spelling of 12121012021121 in words is "twelve trillion, one hundred twenty-one billion, twelve million, twenty-one thousand, one hundred twenty-one".