12082797521 has 4 divisors (see below), whose sum is σ = 12083071344. Its totient is φ = 12082523700.

The previous prime is 12082797497. The next prime is 12082797533. The reversal of 12082797521 is 12579728021.

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 a de Polignac number, because none of the positive numbers 2^k-12082797521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12082797421) 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, 53975 + ... + 164556.

It is an arithmetic number, because the mean of its divisors is an integer number (3020767836).

Almost surely, 2^12082797521 is an apocalyptic number.

It is an amenable number.

12082797521 is a deficient number, since it is larger than the sum of its proper divisors (273823).

12082797521 is an equidigital number, since it uses as much as digits as its factorization.

12082797521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273822.

The product of its (nonzero) digits is 141120, while the sum is 44.

The spelling of 12082797521 in words is "twelve billion, eighty-two million, seven hundred ninety-seven thousand, five hundred twenty-one".