2111100228 has 72 divisors (see below), whose sum is σ = 5410805400. Its totient is φ = 693950976.

The previous prime is 2111100223. The next prime is 2111100281. The reversal of 2111100228 is 8220011112.

It can be written as a sum of positive squares in 4 ways, for example, as 517653504 + 1593446724 = 22752^2 + 39918^2 .

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 2111100228.

It is not an unprimeable number, because it can be changed into a prime (2111100221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 913138 + ... + 915446.

It is an arithmetic number, because the mean of its divisors is an integer number (75150075).

Almost surely, 2^2111100228 is an apocalyptic number.

It is an amenable number.

2111100228 is an abundant number, since it is smaller than the sum of its proper divisors (3299705172).

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

2111100228 is a wasteful number, since it uses less digits than its factorization.

2111100228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661 (or 2656 counting only the distinct ones).

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

The square root of 2111100228 is about 45946.7107419019. The cubic root of 2111100228 is about 1282.8315060184.

The spelling of 2111100228 in words is "two billion, one hundred eleven million, one hundred thousand, two hundred twenty-eight".