2111021000028 has 48 divisors (see below), whose sum is σ = 5794959612960. Its totient is φ = 662281097472.

The previous prime is 2111021000009. The next prime is 2111021000029. The reversal of 2111021000028 is 8200001201112.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111021000029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 574894951 + ... + 574898622.

It is an arithmetic number, because the mean of its divisors is an integer number (120728325270).

Almost surely, 2^{2111021000028} is an apocalyptic number.

It is an amenable number.

2111021000028 is an abundant number, since it is smaller than the sum of its proper divisors (3683938612932).

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

2111021000028 is a wasteful number, since it uses less digits than its factorization.

2111021000028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149793603 (or 1149793595 counting only the distinct ones).

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

The spelling of 2111021000028 in words is "two trillion, one hundred eleven billion, twenty-one million, twenty-eight", and thus it is an aban number.