12100212202121 has 8 divisors (see below), whose sum is σ = 12598541615688. Its totient is φ = 11611559088000.

The previous prime is 12100212202021. The next prime is 12100212202229. The reversal of 12100212202121 is 12120221200121.

It can be written as a sum of positive squares in 4 ways, for example, as 2144994576400 + 9955217625721 = 1464580^2 + 3155189^2 .

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 12100212202121 - 2¹⁰ = 12100212201097 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 12100212202121.

It is not an unprimeable number, because it can be changed into a prime (12100212202021) 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, 2419072310 + ... + 2419077311.

It is an arithmetic number, because the mean of its divisors is an integer number (1574817701961).

Almost surely, 2^{12100212202121} is an apocalyptic number.

It is an amenable number.

12100212202121 is a deficient number, since it is larger than the sum of its proper divisors (498329413567).

12100212202121 is an equidigital number, since it uses as much as digits as its factorization.

12100212202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4838149723.

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

Adding to 12100212202121 its reverse (12120221200121), we get a palindrome (24220433402242).

The spelling of 12100212202121 in words is "twelve trillion, one hundred billion, two hundred twelve million, two hundred two thousand, one hundred twenty-one".