12105500072 has 16 divisors (see below), whose sum is σ = 22842387060. Its totient is φ = 6014196864.

The previous prime is 12105500027. The next prime is 12105500089. The reversal of 12105500072 is 27000550121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10505020036 + 1600480036 = 102494^2 + 40006^2 .

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, 4817813 + ... + 4820324.

Almost surely, 2^12105500072 is an apocalyptic number.

It is an amenable number.

12105500072 is a deficient number, since it is larger than the sum of its proper divisors (10736886988).

12105500072 is a wasteful number, since it uses less digits than its factorization.

12105500072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9638300 (or 9638296 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 23.

The spelling of 12105500072 in words is "twelve billion, one hundred five million, five hundred thousand, seventy-two".