128346128213 has 2 divisors, whose sum is σ = 128346128214. Its totient is φ = 128346128212.

The previous prime is 128346128167. The next prime is 128346128231. The reversal of 128346128213 is 312821643821.

Together with next prime (128346128231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108851825329 + 19494302884 = 329927^2 + 139622^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128346128213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128346128243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64173064106 + 64173064107.

It is an arithmetic number, because the mean of its divisors is an integer number (64173064107).

Almost surely, 2^128346128213 is an apocalyptic number.

It is an amenable number.

128346128213 is a deficient number, since it is larger than the sum of its proper divisors (1).

128346128213 is an equidigital number, since it uses as much as digits as its factorization.

128346128213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 41.

The spelling of 128346128213 in words is "one hundred twenty-eight billion, three hundred forty-six million, one hundred twenty-eight thousand, two hundred thirteen".