128187011 has 2 divisors, whose sum is σ = 128187012. Its totient is φ = 128187010.

The previous prime is 128186969. The next prime is 128187041. The reversal of 128187011 is 110781821.

It is a strong prime.

It is an emirp because it is prime and its reverse (110781821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128187011 - 2¹⁰ = 128185987 is a prime.

It is a super-2 number, since 2×128187011² = 32863819578228242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128187041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64093505 + 64093506.

It is an arithmetic number, because the mean of its divisors is an integer number (64093506).

Almost surely, 2^128187011 is an apocalyptic number.

128187011 is a deficient number, since it is larger than the sum of its proper divisors (1).

128187011 is an equidigital number, since it uses as much as digits as its factorization.

128187011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 29.

The square root of 128187011 is about 11321.9702790636. The cubic root of 128187011 is about 504.2137370831.

The spelling of 128187011 in words is "one hundred twenty-eight million, one hundred eighty-seven thousand, eleven".