12440123347 has 2 divisors, whose sum is σ = 12440123348. Its totient is φ = 12440123346.

The previous prime is 12440123317. The next prime is 12440123351. The reversal of 12440123347 is 74332104421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12440123347 - 2¹¹ = 12440121299 is a prime.

It is not a weakly prime, because it can be changed into another prime (12440123317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6220061673 + 6220061674.

It is an arithmetic number, because the mean of its divisors is an integer number (6220061674).

Almost surely, 2^12440123347 is an apocalyptic number.

12440123347 is a deficient number, since it is larger than the sum of its proper divisors (1).

12440123347 is an equidigital number, since it uses as much as digits as its factorization.

12440123347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 31.

Adding to 12440123347 its reverse (74332104421), we get a palindrome (86772227768).

The spelling of 12440123347 in words is "twelve billion, four hundred forty million, one hundred twenty-three thousand, three hundred forty-seven".