13220312279 has 2 divisors, whose sum is σ = 13220312280. Its totient is φ = 13220312278.

The previous prime is 13220312257. The next prime is 13220312311. The reversal of 13220312279 is 97221302231.

It is an a-pointer prime, because the next prime (13220312311) can be obtained adding 13220312279 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13220312279 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13220312249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610156139 + 6610156140.

It is an arithmetic number, because the mean of its divisors is an integer number (6610156140).

Almost surely, 2^13220312279 is an apocalyptic number.

13220312279 is a deficient number, since it is larger than the sum of its proper divisors (1).

13220312279 is an equidigital number, since it uses as much as digits as its factorization.

13220312279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The spelling of 13220312279 in words is "thirteen billion, two hundred twenty million, three hundred twelve thousand, two hundred seventy-nine".