102128211 has 36 divisors (see below), whose sum is σ = 162471400. Its totient is φ = 61642944.

The previous prime is 102128209. The next prime is 102128237. The reversal of 102128211 is 112821201.

It is not a de Polignac number, because 102128211 - 2¹ = 102128209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102128261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 89895 + ... + 91023.

Almost surely, 2^102128211 is an apocalyptic number.

102128211 is a deficient number, since it is larger than the sum of its proper divisors (60343189).

102128211 is a wasteful number, since it uses less digits than its factorization.

102128211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200 (or 1174 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 102128211 is about 10105.8503353256. The cubic root of 102128211 is about 467.4285568617.

Adding to 102128211 its reverse (112821201), we get a palindrome (214949412).

The spelling of 102128211 in words is "one hundred two million, one hundred twenty-eight thousand, two hundred eleven".