20121121212201 has 64 divisors (see below), whose sum is σ = 30125152189440. Its totient is φ = 13272280842240.

The previous prime is 20121121212193. The next prime is 20121121212217. The reversal of 20121121212201 is 10221212112102.

20121121212201 is a `hidden beast` number, since 20 + 1 + 211 + 21 + 212 + 201 = 666.

It is not a de Polignac number, because 20121121212201 - 2³ = 20121121212193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20121121216201) 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 63 ways as a sum of consecutive naturals, for example, 6018879936 + ... + 6018883278.

It is an arithmetic number, because the mean of its divisors is an integer number (470705502960).

Almost surely, 2^{20121121212201} is an apocalyptic number.

It is an amenable number.

20121121212201 is a deficient number, since it is larger than the sum of its proper divisors (10004030977239).

20121121212201 is a wasteful number, since it uses less digits than its factorization.

20121121212201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6303 (or 6297 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20121121212201 its reverse (10221212112102), we get a palindrome (30342333324303).

The spelling of 20121121212201 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twelve thousand, two hundred one".