120128081 has 2 divisors, whose sum is σ = 120128082. Its totient is φ = 120128080.

The previous prime is 120128077. The next prime is 120128117. The reversal of 120128081 is 180821021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109830400 + 10297681 = 10480^2 + 3209^2 .

It is a cyclic number.

It is not a de Polignac number, because 120128081 - 2² = 120128077 is a prime.

It is a super-2 number, since 2×120128081² = 28861511689485122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (120122081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60064040 + 60064041.

It is an arithmetic number, because the mean of its divisors is an integer number (60064041).

Almost surely, 2^120128081 is an apocalyptic number.

It is an amenable number.

120128081 is a deficient number, since it is larger than the sum of its proper divisors (1).

120128081 is an equidigital number, since it uses as much as digits as its factorization.

120128081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 120128081 is about 10960.2956620704. The cubic root of 120128081 is about 493.4178385289.

The spelling of 120128081 in words is "one hundred twenty million, one hundred twenty-eight thousand, eighty-one".