12440231209 has 8 divisors (see below), whose sum is σ = 14965691840. Its totient is φ = 10101841776.

The previous prime is 12440231203. The next prime is 12440231227. The reversal of 12440231209 is 90213204421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12440231209 - 2⁷ = 12440231081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12440231203) 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, 46767654 + ... + 46767919.

It is an arithmetic number, because the mean of its divisors is an integer number (1870711480).

Almost surely, 2^12440231209 is an apocalyptic number.

12440231209 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12440231209 is a deficient number, since it is larger than the sum of its proper divisors (2525460631).

12440231209 is an equidigital number, since it uses as much as digits as its factorization.

12440231209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93535599.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 12440231209 in words is "twelve billion, four hundred forty million, two hundred thirty-one thousand, two hundred nine".