12102012112 has 20 divisors (see below), whose sum is σ = 23503356676. Its totient is φ = 6036629760.

The previous prime is 12102012073. The next prime is 12102012113. The reversal of 12102012112 is 21121020121.

It can be written as a sum of positive squares in 2 ways, for example, as 42458256 + 12059553856 = 6516^2 + 109816^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12102012092 and 12102012101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102012113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 891573 + ... + 905044.

Almost surely, 2^12102012112 is an apocalyptic number.

It is an amenable number.

12102012112 is a deficient number, since it is larger than the sum of its proper divisors (11401344564).

12102012112 is a wasteful number, since it uses less digits than its factorization.

12102012112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797046 (or 1797040 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12102012112 its reverse (21121020121), we get a palindrome (33223032233).

The spelling of 12102012112 in words is "twelve billion, one hundred two million, twelve thousand, one hundred twelve".