2101111112 has 16 divisors (see below), whose sum is σ = 3993551340. Its totient is φ = 1036164096.

The previous prime is 2101111109. The next prime is 2101111121. The reversal of 2101111112 is 2111111012.

It can be written as a sum of positive squares in 2 ways, for example, as 2094526756 + 6584356 = 45766^2 + 2566^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2101111093 and 2101111102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1798313 + ... + 1799480.

Almost surely, 2^2101111112 is an apocalyptic number.

It is an amenable number.

2101111112 is a deficient number, since it is larger than the sum of its proper divisors (1892440228).

2101111112 is a wasteful number, since it uses less digits than its factorization.

2101111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3597872 (or 3597868 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

The square root of 2101111112 is about 45837.8785722027. The cubic root of 2101111112 is about 1280.8049770516.

Adding to 2101111112 its reverse (2111111012), we get a palindrome (4212222124).

It can be divided in two parts, 21011 and 11112, that added together give a palindrome (32123).

The spelling of 2101111112 in words is "two billion, one hundred one million, one hundred eleven thousand, one hundred twelve".