12126378412 has 24 divisors (see below), whose sum is σ = 22147679232. Its totient is φ = 5798562000.

The previous prime is 12126378371. The next prime is 12126378413. The reversal of 12126378412 is 21487362121.

It is not an unprimeable number, because it can be changed into a prime (12126378413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1044037 + ... + 1055587.

It is an arithmetic number, because the mean of its divisors is an integer number (922819968).

Almost surely, 2^12126378412 is an apocalyptic number.

It is an amenable number.

12126378412 is a deficient number, since it is larger than the sum of its proper divisors (10021300820).

12126378412 is a wasteful number, since it uses less digits than its factorization.

12126378412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22989 (or 22987 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The spelling of 12126378412 in words is "twelve billion, one hundred twenty-six million, three hundred seventy-eight thousand, four hundred twelve".