12440421313 has 16 divisors (see below), whose sum is σ = 13395977424. Its totient is φ = 11509954560.

The previous prime is 12440421307. The next prime is 12440421319. The reversal of 12440421313 is 31312404421.

It is an interprime number because it is at equal distance from previous prime (12440421307) and next prime (12440421319).

It can be written as a sum of positive squares in 8 ways, for example, as 1214383104 + 11226038209 = 34848^2 + 105953^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12440421313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12440421319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3064381 + ... + 3068437.

It is an arithmetic number, because the mean of its divisors is an integer number (837248589).

Almost surely, 2^12440421313 is an apocalyptic number.

It is an amenable number.

12440421313 is a deficient number, since it is larger than the sum of its proper divisors (955556111).

12440421313 is a wasteful number, since it uses less digits than its factorization.

12440421313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7092.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 12440421313 its reverse (31312404421), we get a palindrome (43752825734).

The spelling of 12440421313 in words is "twelve billion, four hundred forty million, four hundred twenty-one thousand, three hundred thirteen".