12102102202121 has 4 divisors (see below), whose sum is σ = 12102120035652. Its totient is φ = 12102084368592.

The previous prime is 12102102202117. The next prime is 12102102202123. The reversal of 12102102202121 is 12120220120121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8203297939600 + 3898804262521 = 2864140^2 + 1974539^2 .

It is a cyclic number.

It is not a de Polignac number, because 12102102202121 - 2² = 12102102202117 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 12102102202121.

It is not an unprimeable number, because it can be changed into a prime (12102102202123) 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 3 ways as a sum of consecutive naturals, for example, 7856846 + ... + 9270071.

It is an arithmetic number, because the mean of its divisors is an integer number (3025530008913).

Almost surely, 2^{12102102202121} is an apocalyptic number.

It is an amenable number.

12102102202121 is a deficient number, since it is larger than the sum of its proper divisors (17833531).

12102102202121 is an equidigital number, since it uses as much as digits as its factorization.

12102102202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17833530.

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

Adding to 12102102202121 its reverse (12120220120121), we get a palindrome (24222322322242).

The spelling of 12102102202121 in words is "twelve trillion, one hundred two billion, one hundred two million, two hundred two thousand, one hundred twenty-one".