128231105641 has 2 divisors, whose sum is σ = 128231105642. Its totient is φ = 128231105640.

The previous prime is 128231105623. The next prime is 128231105647. The reversal of 128231105641 is 146501132821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99527630400 + 28703475241 = 315480^2 + 169421^2 .

It is an emirp because it is prime and its reverse (146501132821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128231105641 - 2²⁹ = 127694234729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128231105597 and 128231105606.

It is not a weakly prime, because it can be changed into another prime (128231105647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64115552820 + 64115552821.

It is an arithmetic number, because the mean of its divisors is an integer number (64115552821).

Almost surely, 2^128231105641 is an apocalyptic number.

It is an amenable number.

128231105641 is a deficient number, since it is larger than the sum of its proper divisors (1).

128231105641 is an equidigital number, since it uses as much as digits as its factorization.

128231105641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 128231105641 in words is "one hundred twenty-eight billion, two hundred thirty-one million, one hundred five thousand, six hundred forty-one".