102111111112 has 16 divisors (see below), whose sum is σ = 194081051340. Its totient is φ = 50356164096.

The previous prime is 102111111107. The next prime is 102111111131. The reversal of 102111111112 is 211111111201.

It can be written as a sum of positive squares in 2 ways, for example, as 84672852196 + 17438258916 = 290986^2 + 132054^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102111111092 and 102111111101.

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, 87423313 + ... + 87424480.

Almost surely, 2^102111111112 is an apocalyptic number.

It is an amenable number.

102111111112 is a deficient number, since it is larger than the sum of its proper divisors (91969940228).

102111111112 is a wasteful number, since it uses less digits than its factorization.

102111111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174847872 (or 174847868 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 102111111112 its reverse (211111111201), we get a palindrome (313222222313).

The spelling of 102111111112 in words is "one hundred two billion, one hundred eleven million, one hundred eleven thousand, one hundred twelve".