12084128528921 has 4 divisors (see below), whose sum is σ = 12229720438992. Its totient is φ = 11938536618852.

The previous prime is 12084128528911. The next prime is 12084128528959. The reversal of 12084128528921 is 12982582148021.

12084128528921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12084128528921 - 2¹⁰ = 12084128527897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12084128528911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72795954911 + ... + 72795955076.

It is an arithmetic number, because the mean of its divisors is an integer number (3057430109748).

Almost surely, 2^{12084128528921} is an apocalyptic number.

It is an amenable number.

12084128528921 is a deficient number, since it is larger than the sum of its proper divisors (145591910071).

12084128528921 is an equidigital number, since it uses as much as digits as its factorization.

12084128528921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145591910070.

The product of its (nonzero) digits is 1474560, while the sum is 53.

The spelling of 12084128528921 in words is "twelve trillion, eighty-four billion, one hundred twenty-eight million, five hundred twenty-eight thousand, nine hundred twenty-one".