128101116 has 96 divisors (see below), whose sum is σ = 369734400. Its totient is φ = 33937920.

The previous prime is 128101087. The next prime is 128101123. The reversal of 128101116 is 611101821.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 128101092 and 128101101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30640 + ... + 34568.

It is an arithmetic number, because the mean of its divisors is an integer number (3851400).

Almost surely, 2^128101116 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128101116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184867200).

128101116 is an abundant number, since it is smaller than the sum of its proper divisors (241633284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128101116 is a wasteful number, since it uses less digits than its factorization.

128101116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3979 (or 3977 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 21.

The square root of 128101116 is about 11318.1763548727. The cubic root of 128101116 is about 504.1010914629.

Adding to 128101116 its reverse (611101821), we get a palindrome (739202937).

The spelling of 128101116 in words is "one hundred twenty-eight million, one hundred one thousand, one hundred sixteen".