128346128231 has 2 divisors, whose sum is σ = 128346128232. Its totient is φ = 128346128230.

The previous prime is 128346128213. The next prime is 128346128243. The reversal of 128346128231 is 132821643821.

Together with previous prime (128346128213) 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 not a de Polignac number, because 128346128231 - 2⁶ = 128346128167 is a prime.

It is a super-2 number, since 2×128346128231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128346122231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64173064115 + 64173064116.

It is an arithmetic number, because the mean of its divisors is an integer number (64173064116).

Almost surely, 2^128346128231 is an apocalyptic number.

128346128231 is a deficient number, since it is larger than the sum of its proper divisors (1).

128346128231 is an equidigital number, since it uses as much as digits as its factorization.

128346128231 is an evil number, because the sum of its binary digits is even.

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

The spelling of 128346128231 in words is "one hundred twenty-eight billion, three hundred forty-six million, one hundred twenty-eight thousand, two hundred thirty-one".