12121312122121 has 8 divisors (see below), whose sum is σ = 12648597384384. Its totient is φ = 11594049500880.

The previous prime is 12121312122109. The next prime is 12121312122131. The reversal of 12121312122121 is 12122121312121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12121312122121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12121312122092 and 12121312122101.

It is not an unprimeable number, because it can be changed into a prime (12121312122131) 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 7 ways as a sum of consecutive naturals, for example, 4561690 + ... + 6712051.

It is an arithmetic number, because the mean of its divisors is an integer number (1581074673048).

Almost surely, 2^{12121312122121} is an apocalyptic number.

It is an amenable number.

12121312122121 is a deficient number, since it is larger than the sum of its proper divisors (527285262263).

12121312122121 is a wasteful number, since it uses less digits than its factorization.

12121312122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11320511.

The product of its digits is 192, while the sum is 22.

Adding to 12121312122121 its reverse (12122121312121), we get a palindrome (24243433434242).

The spelling of 12121312122121 in words is "twelve trillion, one hundred twenty-one billion, three hundred twelve million, one hundred twenty-two thousand, one hundred twenty-one".