12479201321 has 4 divisors (see below), whose sum is σ = 12562954500. Its totient is φ = 12395448144.

The previous prime is 12479201303. The next prime is 12479201347. The reversal of 12479201321 is 12310297421.

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 1708912921 + 10770288400 = 41339^2 + 103780^2 .

It is a cyclic number.

It is not a de Polignac number, because 12479201321 - 2¹⁰ = 12479200297 is a prime.

It is a super-2 number, since 2×12479201321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12479201351) 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, 41876366 + ... + 41876663.

It is an arithmetic number, because the mean of its divisors is an integer number (3140738625).

Almost surely, 2^12479201321 is an apocalyptic number.

It is an amenable number.

12479201321 is a deficient number, since it is larger than the sum of its proper divisors (83753179).

12479201321 is an equidigital number, since it uses as much as digits as its factorization.

12479201321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83753178.

The product of its (nonzero) digits is 6048, while the sum is 32.

Adding to 12479201321 its reverse (12310297421), we get a palindrome (24789498742).

The spelling of 12479201321 in words is "twelve billion, four hundred seventy-nine million, two hundred one thousand, three hundred twenty-one".