128188038101 has 2 divisors, whose sum is σ = 128188038102. Its totient is φ = 128188038100.

The previous prime is 128188038091. The next prime is 128188038113. The reversal of 128188038101 is 101830881821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125333700625 + 2854337476 = 354025^2 + 53426^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128188038101 is a prime.

It is a super-2 number, since 2×128188038101² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128188338101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64094019050 + 64094019051.

It is an arithmetic number, because the mean of its divisors is an integer number (64094019051).

Almost surely, 2^128188038101 is an apocalyptic number.

It is an amenable number.

128188038101 is a deficient number, since it is larger than the sum of its proper divisors (1).

128188038101 is an equidigital number, since it uses as much as digits as its factorization.

128188038101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24576, while the sum is 41.

The spelling of 128188038101 in words is "one hundred twenty-eight billion, one hundred eighty-eight million, thirty-eight thousand, one hundred one".