20121212020121 has 8 divisors (see below), whose sum is σ = 20233744175520. Its totient is φ = 20008681233408.

The previous prime is 20121212020093. The next prime is 20121212020127. The reversal of 20121212020121 is 12102021212102.

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-20121212020121 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 20121212020121.

It is not an unprimeable number, because it can be changed into a prime (20121212020127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48872690 + ... + 49282676.

It is an arithmetic number, because the mean of its divisors is an integer number (2529218021940).

Almost surely, 2^{20121212020121} is an apocalyptic number.

It is an amenable number.

20121212020121 is a deficient number, since it is larger than the sum of its proper divisors (112532155399).

20121212020121 is a wasteful number, since it uses less digits than its factorization.

20121212020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684343.

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

Adding to 20121212020121 its reverse (12102021212102), we get a palindrome (32223233232223).

The spelling of 20121212020121 in words is "twenty trillion, one hundred twenty-one billion, two hundred twelve million, twenty thousand, one hundred twenty-one".