128023373321 has 2 divisors, whose sum is σ = 128023373322. Its totient is φ = 128023373320.

The previous prime is 128023373279. The next prime is 128023373363. The reversal of 128023373321 is 123373320821.

It is a balanced prime because it is at equal distance from previous prime (128023373279) and next prime (128023373363).

It can be written as a sum of positive squares in only one way, i.e., 88991839225 + 39031534096 = 298315^2 + 197564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128023373321 is a prime.

It is not a weakly prime, because it can be changed into another prime (128023376321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64011686660 + 64011686661.

It is an arithmetic number, because the mean of its divisors is an integer number (64011686661).

Almost surely, 2^128023373321 is an apocalyptic number.

It is an amenable number.

128023373321 is a deficient number, since it is larger than the sum of its proper divisors (1).

128023373321 is an equidigital number, since it uses as much as digits as its factorization.

128023373321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 35.

The spelling of 128023373321 in words is "one hundred twenty-eight billion, twenty-three million, three hundred seventy-three thousand, three hundred twenty-one".