20121120013121 has 8 divisors (see below), whose sum is σ = 20218439103744. Its totient is φ = 20023864225200.

The previous prime is 20121120013061. The next prime is 20121120013129. The reversal of 20121120013121 is 12131002112102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20121120013121 - 2²⁶ = 20121052904257 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 20121120013121.

It is not an unprimeable number, because it can be changed into a prime (20121120013129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15188366 + ... + 16459911.

It is an arithmetic number, because the mean of its divisors is an integer number (2527304887968).

Almost surely, 2^{20121120013121} is an apocalyptic number.

It is an amenable number.

20121120013121 is a deficient number, since it is larger than the sum of its proper divisors (97319090623).

20121120013121 is a wasteful number, since it uses less digits than its factorization.

20121120013121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31651351.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 20121120013121 its reverse (12131002112102), we get a palindrome (32252122125223).

The spelling of 20121120013121 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty million, thirteen thousand, one hundred twenty-one".