128313011 has 4 divisors (see below), whose sum is σ = 128958000. Its totient is φ = 127668024.

The previous prime is 128313007. The next prime is 128313013. The reversal of 128313011 is 110313821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110313821 = 41 ⋅2690581.

It is a cyclic number.

It is not a de Polignac number, because 128313011 - 2² = 128313007 is a prime.

It is a super-2 number, since 2×128313011² = 32928457583772242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128313013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322196 + ... + 322593.

It is an arithmetic number, because the mean of its divisors is an integer number (32239500).

Almost surely, 2^128313011 is an apocalyptic number.

128313011 is a deficient number, since it is larger than the sum of its proper divisors (644989).

128313011 is an equidigital number, since it uses as much as digits as its factorization.

128313011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644988.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 128313011 is about 11327.5333148925. The cubic root of 128313011 is about 504.3788867502.

Adding to 128313011 its reverse (110313821), we get a palindrome (238626832).

The spelling of 128313011 in words is "one hundred twenty-eight million, three hundred thirteen thousand, eleven".