12640321301 has 4 divisors (see below), whose sum is σ = 13189900512. Its totient is φ = 12090742092.

The previous prime is 12640321289. The next prime is 12640321319. The reversal of 12640321301 is 10312304621.

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-12640321301 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 549579187 = 12640321301 / (1 + 2 + 6 + 4 + 0 + 3 + 2 + 1 + 3 + 0 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640329301) 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, 274789571 + ... + 274789616.

It is an arithmetic number, because the mean of its divisors is an integer number (3297475128).

Almost surely, 2^12640321301 is an apocalyptic number.

It is an amenable number.

12640321301 is a deficient number, since it is larger than the sum of its proper divisors (549579211).

12640321301 is an equidigital number, since it uses as much as digits as its factorization.

12640321301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549579210.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 12640321301 its reverse (10312304621), we get a palindrome (22952625922).

The spelling of 12640321301 in words is "twelve billion, six hundred forty million, three hundred twenty-one thousand, three hundred one".