12012220120121 has 16 divisors (see below), whose sum is σ = 13048014674688. Its totient is φ = 10992609360000.

The previous prime is 12012220120091. The next prime is 12012220120123. The reversal of 12012220120121 is 12102102221021.

It is a cyclic number.

It is not a de Polignac number, because 12012220120121 - 2⁶ = 12012220120057 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 12012220120121.

It is not an unprimeable number, because it can be changed into a prime (12012220120123) 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 15 ways as a sum of consecutive naturals, for example, 3152915 + ... + 5827976.

It is an arithmetic number, because the mean of its divisors is an integer number (815500917168).

Almost surely, 2^{12012220120121} is an apocalyptic number.

It is an amenable number.

12012220120121 is a deficient number, since it is larger than the sum of its proper divisors (1035794554567).

12012220120121 is a wasteful number, since it uses less digits than its factorization.

12012220120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8981792.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12012220120121 its reverse (12102102221021), we get a palindrome (24114322341142).

The spelling of 12012220120121 in words is "twelve trillion, twelve billion, two hundred twenty million, one hundred twenty thousand, one hundred twenty-one".