128131111002 has 16 divisors (see below), whose sum is σ = 256271421600. Its totient is φ = 42708837072.

The previous prime is 128131110973. The next prime is 128131111013. The reversal of 128131111002 is 200111131821.

128131111002 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 128131111002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195148 + ... + 542535.

It is an arithmetic number, because the mean of its divisors is an integer number (16016963850).

Almost surely, 2^128131111002 is an apocalyptic number.

128131111002 is an abundant number, since it is smaller than the sum of its proper divisors (128140310598).

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

128131111002 is a wasteful number, since it uses less digits than its factorization.

128131111002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766637.

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

Adding to 128131111002 its reverse (200111131821), we get a palindrome (328242242823).

The spelling of 128131111002 in words is "one hundred twenty-eight billion, one hundred thirty-one million, one hundred eleven thousand, two".