12487092821 has 6 divisors (see below), whose sum is σ = 14525801910. Its totient is φ = 10703222376.

The previous prime is 12487092791. The next prime is 12487092823. The reversal of 12487092821 is 12829078421.

12487092821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6667539025 + 5819553796 = 81655^2 + 76286^2 .

It is not a de Polignac number, because 12487092821 - 2¹⁰ = 12487091797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12487092823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 127419266 + ... + 127419363.

It is an arithmetic number, because the mean of its divisors is an integer number (2420966985).

Almost surely, 2^12487092821 is an apocalyptic number.

It is an amenable number.

12487092821 is a deficient number, since it is larger than the sum of its proper divisors (2038709089).

12487092821 is an equidigital number, since it uses as much as digits as its factorization.

12487092821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254838643 (or 254838636 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 44.

The spelling of 12487092821 in words is "twelve billion, four hundred eighty-seven million, ninety-two thousand, eight hundred twenty-one".