13220123312309 has 2 divisors, whose sum is σ = 13220123312310. Its totient is φ = 13220123312308.

The previous prime is 13220123312203. The next prime is 13220123312441. The reversal of 13220123312309 is 90321332102231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13220096043025 + 27269284 = 3635945^2 + 5222^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13220123312309 is a prime.

It is a super-2 number, since 2×13220123312309² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13220123317309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610061656154 + 6610061656155.

It is an arithmetic number, because the mean of its divisors is an integer number (6610061656155).

Almost surely, 2^{13220123312309} is an apocalyptic number.

It is an amenable number.

13220123312309 is a deficient number, since it is larger than the sum of its proper divisors (1).

13220123312309 is an equidigital number, since it uses as much as digits as its factorization.

13220123312309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 32.

The spelling of 13220123312309 in words is "thirteen trillion, two hundred twenty billion, one hundred twenty-three million, three hundred twelve thousand, three hundred nine".