12012021202121 has 16 divisors (see below), whose sum is σ = 12377088541440. Its totient is φ = 11650422222720.

The previous prime is 12012021202087. The next prime is 12012021202187. The reversal of 12012021202121 is 12120212021021.

It is a cyclic number.

It is not a de Polignac number, because 12012021202121 - 2³⁴ = 11994841332937 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 12012021202121.

It is not an unprimeable number, because it can be changed into a prime (12012041202121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27132875 + ... + 27572031.

It is an arithmetic number, because the mean of its divisors is an integer number (773568033840).

Almost surely, 2^{12012021202121} is an apocalyptic number.

It is an amenable number.

12012021202121 is a deficient number, since it is larger than the sum of its proper divisors (365067339319).

12012021202121 is a wasteful number, since it uses less digits than its factorization.

12012021202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443104.

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

Adding to 12012021202121 its reverse (12120212021021), we get a palindrome (24132233223142).

The spelling of 12012021202121 in words is "twelve trillion, twelve billion, twenty-one million, two hundred two thousand, one hundred twenty-one".