128101765901 has 2 divisors, whose sum is σ = 128101765902. Its totient is φ = 128101765900.

The previous prime is 128101765873. The next prime is 128101765927. The reversal of 128101765901 is 109567101821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112701204100 + 15400561801 = 335710^2 + 124099^2 .

It is a cyclic number.

It is not a de Polignac number, because 128101765901 - 2³⁴ = 110921896717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128101765601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64050882950 + 64050882951.

It is an arithmetic number, because the mean of its divisors is an integer number (64050882951).

Almost surely, 2^128101765901 is an apocalyptic number.

It is an amenable number.

128101765901 is a deficient number, since it is larger than the sum of its proper divisors (1).

128101765901 is an equidigital number, since it uses as much as digits as its factorization.

128101765901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 41.

The spelling of 128101765901 in words is "one hundred twenty-eight billion, one hundred one million, seven hundred sixty-five thousand, nine hundred one".