12320144340431 has 4 divisors (see below), whose sum is σ = 12354462291600. Its totient is φ = 12285826389264.

The previous prime is 12320144340391. The next prime is 12320144340437. The reversal of 12320144340431 is 13404344102321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12320144340431 is a prime.

It is a super-2 number, since 2×12320144340431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12320144340437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17158975046 + ... + 17158975763.

It is an arithmetic number, because the mean of its divisors is an integer number (3088615572900).

Almost surely, 2^{12320144340431} is an apocalyptic number.

12320144340431 is a deficient number, since it is larger than the sum of its proper divisors (34317951169).

12320144340431 is an equidigital number, since it uses as much as digits as its factorization.

12320144340431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34317951168.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 12320144340431 its reverse (13404344102321), we get a palindrome (25724488442752).

The spelling of 12320144340431 in words is "twelve trillion, three hundred twenty billion, one hundred forty-four million, three hundred forty thousand, four hundred thirty-one".