12440403212 has 12 divisors (see below), whose sum is σ = 21771722280. Its totient is φ = 6219911136.

The previous prime is 12440403187. The next prime is 12440403221. The reversal of 12440403212 is 21230404421.

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, 44864 + ... + 163992.

It is an arithmetic number, because the mean of its divisors is an integer number (1814310190).

Almost surely, 2^12440403212 is an apocalyptic number.

It is an amenable number.

12440403212 is a deficient number, since it is larger than the sum of its proper divisors (9331319068).

12440403212 is a wasteful number, since it uses less digits than its factorization.

12440403212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145240 (or 145238 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 12440403212 its reverse (21230404421), we get a palindrome (33670807633).

The spelling of 12440403212 in words is "twelve billion, four hundred forty million, four hundred three thousand, two hundred twelve".