2011021128 has 64 divisors (see below), whose sum is σ = 5593896000. Its totient is φ = 669413376.

The previous prime is 2011021121. The next prime is 2011021141. The reversal of 2011021128 is 8211201102.

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 2011021128.

It is not an unprimeable number, because it can be changed into a prime (2011021121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160051 + ... + 172157.

It is an arithmetic number, because the mean of its divisors is an integer number (87404625).

Almost surely, 2^2011021128 is an apocalyptic number.

It is an amenable number.

2011021128 is an abundant number, since it is smaller than the sum of its proper divisors (3582874872).

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

2011021128 is a wasteful number, since it uses less digits than its factorization.

2011021128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12891 (or 12881 counting only the distinct ones).

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

The square root of 2011021128 is about 44844.4102202270. The cubic root of 2011021128 is about 1262.2311037038.

The spelling of 2011021128 in words is "two billion, eleven million, twenty-one thousand, one hundred twenty-eight".