12103131112 has 16 divisors (see below), whose sum is σ = 22700270340. Its totient is φ = 6049725696.

The previous prime is 12103131107. The next prime is 12103131133. The reversal of 12103131112 is 21113130121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11738855716 + 364275396 = 108346^2 + 19086^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201823 + ... + 254830.

Almost surely, 2^12103131112 is an apocalyptic number.

It is an amenable number.

12103131112 is a deficient number, since it is larger than the sum of its proper divisors (10597139228).

12103131112 is a wasteful number, since it uses less digits than its factorization.

12103131112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459972 (or 459968 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 12103131112 its reverse (21113130121), we get a palindrome (33216261233).

Subtracting 12103131112 from its reverse (21113130121), we obtain a palindrome (9009999009).

The spelling of 12103131112 in words is "twelve billion, one hundred three million, one hundred thirty-one thousand, one hundred twelve".