12320651731 has 4 divisors (see below), whose sum is σ = 12553116912. Its totient is φ = 12088186552.

The previous prime is 12320651729. The next prime is 12320651737. The reversal of 12320651731 is 13715602321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13715602321 = 193 ⋅71065297.

It is a cyclic number.

It is not a de Polignac number, because 12320651731 - 2¹ = 12320651729 is a prime.

It is a super-2 number, since 2×12320651731² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12320651693 and 12320651702.

It is not an unprimeable number, because it can be changed into a prime (12320651737) 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, 116232511 + ... + 116232616.

It is an arithmetic number, because the mean of its divisors is an integer number (3138279228).

Almost surely, 2^12320651731 is an apocalyptic number.

12320651731 is a deficient number, since it is larger than the sum of its proper divisors (232465181).

12320651731 is an equidigital number, since it uses as much as digits as its factorization.

12320651731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232465180.

The product of its (nonzero) digits is 7560, while the sum is 31.

The spelling of 12320651731 in words is "twelve billion, three hundred twenty million, six hundred fifty-one thousand, seven hundred thirty-one".