12661113104 has 20 divisors (see below), whose sum is σ = 24534484380. Its totient is φ = 6329633280.

The previous prime is 12661113077. The next prime is 12661113121. The reversal of 12661113104 is 40131116621.

It can be written as a sum of positive squares in 2 ways, for example, as 2261192704 + 10399920400 = 47552^2 + 101980^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63092 + ... + 171180.

It is an arithmetic number, because the mean of its divisors is an integer number (1226724219).

Almost surely, 2^12661113104 is an apocalyptic number.

It is an amenable number.

12661113104 is a deficient number, since it is larger than the sum of its proper divisors (11873371276).

12661113104 is a wasteful number, since it uses less digits than its factorization.

12661113104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115418 (or 115412 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

Adding to 12661113104 its reverse (40131116621), we get a palindrome (52792229725).

The spelling of 12661113104 in words is "twelve billion, six hundred sixty-one million, one hundred thirteen thousand, one hundred four".