12103312 has 20 divisors (see below), whose sum is σ = 25254460. Its totient is φ = 5586048.

The previous prime is 12103279. The next prime is 12103331. The reversal of 12103312 is 21330121.

It can be written as a sum of positive squares in 2 ways, for example, as 1449616 + 10653696 = 1204^2 + 3264^2 .

It is a super-2 number, since 2×12103312² = 292980322738688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 12103292 and 12103301.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28887 + ... + 29302.

It is an arithmetic number, because the mean of its divisors is an integer number (1262723).

Almost surely, 2^12103312 is an apocalyptic number.

It is an amenable number.

12103312 is an abundant number, since it is smaller than the sum of its proper divisors (13151148).

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

12103312 is a wasteful number, since it uses less digits than its factorization.

12103312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58210 (or 58204 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 12103312 is about 3478.9814601403. The cubic root of 12103312 is about 229.5979870892.

Adding to 12103312 its reverse (21330121), we get a palindrome (33433433).

The spelling of 12103312 in words is "twelve million, one hundred three thousand, three hundred twelve".