12101021102121 has 24 divisors (see below), whose sum is σ = 19872985439520. Its totient is φ = 6508112188032.

The previous prime is 12101021102111. The next prime is 12101021102143. The reversal of 12101021102121 is 12120112010121.

It is a happy number.

It is not a de Polignac number, because 12101021102121 - 2²¹ = 12101019004969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12101021102121.

It is not an unprimeable number, because it can be changed into a prime (12101021102111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2421170191 + ... + 2421175188.

It is an arithmetic number, because the mean of its divisors is an integer number (828041059980).

Almost surely, 2^{12101021102121} is an apocalyptic number.

It is an amenable number.

12101021102121 is a deficient number, since it is larger than the sum of its proper divisors (7771964337399).

12101021102121 is a wasteful number, since it uses less digits than its factorization.

12101021102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4842345413 (or 4842345406 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12101021102121 its reverse (12120112010121), we get a palindrome (24221133112242).

The spelling of 12101021102121 in words is "twelve trillion, one hundred one billion, twenty-one million, one hundred two thousand, one hundred twenty-one".