128315101 has 2 divisors, whose sum is σ = 128315102. Its totient is φ = 128315100.

The previous prime is 128315071. The next prime is 128315141. The reversal of 128315101 is 101513821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72080100 + 56235001 = 8490^2 + 7499^2 .

It is a cyclic number.

It is not a de Polignac number, because 128315101 - 2⁷ = 128314973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128315141) 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, 64157550 + 64157551.

It is an arithmetic number, because the mean of its divisors is an integer number (64157551).

Almost surely, 2^128315101 is an apocalyptic number.

It is an amenable number.

128315101 is a deficient number, since it is larger than the sum of its proper divisors (1).

128315101 is an equidigital number, since it uses as much as digits as its factorization.

128315101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 128315101 is about 11327.6255676112. The cubic root of 128315101 is about 504.3816252258.

Adding to 128315101 its reverse (101513821), we get a palindrome (229828922).

It can be divided in two parts, 1283 and 15101, that added together give a 14-th power (16384 = 2¹⁴).

The spelling of 128315101 in words is "one hundred twenty-eight million, three hundred fifteen thousand, one hundred one".