13203121279 has 2 divisors, whose sum is σ = 13203121280. Its totient is φ = 13203121278.

The previous prime is 13203121207. The next prime is 13203121297. The reversal of 13203121279 is 97212130231.

Together with next prime (13203121297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13203121279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13203121279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13203125279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6601560639 + 6601560640.

It is an arithmetic number, because the mean of its divisors is an integer number (6601560640).

Almost surely, 2^13203121279 is an apocalyptic number.

13203121279 is a deficient number, since it is larger than the sum of its proper divisors (1).

13203121279 is an equidigital number, since it uses as much as digits as its factorization.

13203121279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The spelling of 13203121279 in words is "thirteen billion, two hundred three million, one hundred twenty-one thousand, two hundred seventy-nine".