100128380197 has 2 divisors, whose sum is σ = 100128380198. Its totient is φ = 100128380196.

The previous prime is 100128380173. The next prime is 100128380227. The reversal of 100128380197 is 791083821001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50843936196 + 49284444001 = 225486^2 + 222001^2 .

It is a cyclic number.

It is not a de Polignac number, because 100128380197 - 2³¹ = 97980896549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100128380797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50064190098 + 50064190099.

It is an arithmetic number, because the mean of its divisors is an integer number (50064190099).

Almost surely, 2^100128380197 is an apocalyptic number.

It is an amenable number.

100128380197 is a deficient number, since it is larger than the sum of its proper divisors (1).

100128380197 is an equidigital number, since it uses as much as digits as its factorization.

100128380197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 40.

The spelling of 100128380197 in words is "one hundred billion, one hundred twenty-eight million, three hundred eighty thousand, one hundred ninety-seven".