128106131 has 2 divisors, whose sum is σ = 128106132. Its totient is φ = 128106130.

The previous prime is 128106127. The next prime is 128106157. The reversal of 128106131 is 131601821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128106131 - 2² = 128106127 is a prime.

It is a super-2 number, since 2×128106131² = 32822361599578322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 128106097 and 128106106.

It is not a weakly prime, because it can be changed into another prime (128106031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64053065 + 64053066.

It is an arithmetic number, because the mean of its divisors is an integer number (64053066).

Almost surely, 2^128106131 is an apocalyptic number.

128106131 is a deficient number, since it is larger than the sum of its proper divisors (1).

128106131 is an equidigital number, since it uses as much as digits as its factorization.

128106131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 128106131 is about 11318.3978989961. The cubic root of 128106131 is about 504.1076696881.

Adding to 128106131 its reverse (131601821), we get a palindrome (259707952).

The spelling of 128106131 in words is "one hundred twenty-eight million, one hundred six thousand, one hundred thirty-one".