12322747081 has 4 divisors (see below), whose sum is σ = 12344404500. Its totient is φ = 12301089664.

The previous prime is 12322747049. The next prime is 12322747111. The reversal of 12322747081 is 18074722321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3750950025 + 8571797056 = 61245^2 + 92584^2 .

It is a cyclic number.

It is not a de Polignac number, because 12322747081 - 2⁵ = 12322747049 is a prime.

It is a super-2 number, since 2×12322747081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12322747081.

It is not an unprimeable number, because it can be changed into a prime (12322744081) 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, 10827856 + ... + 10828993.

It is an arithmetic number, because the mean of its divisors is an integer number (3086101125).

Almost surely, 2^12322747081 is an apocalyptic number.

It is an amenable number.

12322747081 is a deficient number, since it is larger than the sum of its proper divisors (21657419).

12322747081 is an equidigital number, since it uses as much as digits as its factorization.

12322747081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21657418.

The product of its (nonzero) digits is 37632, while the sum is 37.

The spelling of 12322747081 in words is "twelve billion, three hundred twenty-two million, seven hundred forty-seven thousand, eighty-one".