12486409313221 has 4 divisors (see below), whose sum is σ = 12558585089772. Its totient is φ = 12414233536672.

The previous prime is 12486409313207. The next prime is 12486409313239. The reversal of 12486409313221 is 12231390468421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4855914660996 + 7630494652225 = 2203614^2 + 2762335^2 .

It is a cyclic number.

It is not a de Polignac number, because 12486409313221 - 2²⁵ = 12486375758789 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 (12486409313321) 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, 36087888016 + ... + 36087888361.

It is an arithmetic number, because the mean of its divisors is an integer number (3139646272443).

Almost surely, 2^{12486409313221} is an apocalyptic number.

It is an amenable number.

12486409313221 is a deficient number, since it is larger than the sum of its proper divisors (72175776551).

12486409313221 is an equidigital number, since it uses as much as digits as its factorization.

12486409313221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72175776550.

The product of its (nonzero) digits is 497664, while the sum is 46.

The spelling of 12486409313221 in words is "twelve trillion, four hundred eighty-six billion, four hundred nine million, three hundred thirteen thousand, two hundred twenty-one".