2111100010128 has 100 divisors (see below), whose sum is σ = 6119084500848. Its totient is φ = 702669401280.

The previous prime is 2111100010127. The next prime is 2111100010183. The reversal of 2111100010128 is 8210100011112.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 2111100010128.

It is not an unprimeable number, because it can be changed into a prime (2111100010127) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 307318 + ... + 2077653.

Almost surely, 2^{2111100010128} 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 2111100010128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3059542250424).

2111100010128 is an abundant number, since it is smaller than the sum of its proper divisors (4007984490720).

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

2111100010128 is a wasteful number, since it uses less digits than its factorization.

2111100010128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2385674 (or 2385659 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

The spelling of 2111100010128 in words is "two trillion, one hundred eleven billion, one hundred million, ten thousand, one hundred twenty-eight".