12020000000121 has 24 divisors (see below), whose sum is σ = 17516336169696. Its totient is φ = 7942207593600.

The previous prime is 12020000000117. The next prime is 12020000000161. The reversal of 12020000000121 is 12100000002021.

It is not a de Polignac number, because 12020000000121 - 2² = 12020000000117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (12020000000161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44257686 + ... + 44528448.

It is an arithmetic number, because the mean of its divisors is an integer number (729847340404).

Almost surely, 2^{12020000000121} is an apocalyptic number.

It is an amenable number.

12020000000121 is a deficient number, since it is larger than the sum of its proper divisors (5496336169575).

12020000000121 is a wasteful number, since it uses less digits than its factorization.

12020000000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314533 (or 314530 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 12020000000121 its reverse (12100000002021), we get a palindrome (24120000002142).

The spelling of 12020000000121 in words is "twelve trillion, twenty billion, one hundred twenty-one", and thus it is an aban number.