102102128 has 20 divisors (see below), whose sum is σ = 200329440. Its totient is φ = 50404224.

The previous prime is 102102109. The next prime is 102102139. The reversal of 102102128 is 821201201.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 39125 + ... + 41652.

It is an arithmetic number, because the mean of its divisors is an integer number (10016472).

Almost surely, 2^102102128 is an apocalyptic number.

It is an amenable number.

102102128 is a deficient number, since it is larger than the sum of its proper divisors (98227312).

102102128 is an equidigital number, since it uses as much as digits as its factorization.

102102128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80864 (or 80858 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 102102128 is about 10104.5597628002. The cubic root of 102102128 is about 467.3887605541.

Adding to 102102128 its reverse (821201201), we get a palindrome (923303329).

The spelling of 102102128 in words is "one hundred two million, one hundred two thousand, one hundred twenty-eight".