12000121110021 has 8 divisors (see below), whose sum is σ = 17454721614624. Its totient is φ = 7272800672720.

The previous prime is 12000121110013. The next prime is 12000121110083. The reversal of 12000121110021 is 12001112100021.

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

It is not a de Polignac number, because 12000121110021 - 2³ = 12000121110013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12000121109979 and 12000121110006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000121110821) 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, 181820016786 + ... + 181820016851.

It is an arithmetic number, because the mean of its divisors is an integer number (2181840201828).

Almost surely, 2^{12000121110021} is an apocalyptic number.

12000121110021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12000121110021 is a deficient number, since it is larger than the sum of its proper divisors (5454600504603).

12000121110021 is a wasteful number, since it uses less digits than its factorization.

12000121110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363640033651.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12000121110021 its reverse (12001112100021), we get a palindrome (24001233210042).

The spelling of 12000121110021 in words is "twelve trillion, one hundred twenty-one million, one hundred ten thousand, twenty-one".