12031300309 has 24 divisors (see below), whose sum is σ = 14533523928. Its totient is φ = 9923074560.

The previous prime is 12031300301. The next prime is 12031300319. The reversal of 12031300309 is 90300313021.

It can be written as a sum of positive squares in 4 ways, for example, as 629759025 + 11401541284 = 25095^2 + 106778^2 .

It is not a de Polignac number, because 12031300309 - 2³ = 12031300301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12031300309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031300301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105639 + ... + 187675.

It is an arithmetic number, because the mean of its divisors is an integer number (605563497).

Almost surely, 2^12031300309 is an apocalyptic number.

It is an amenable number.

12031300309 is a deficient number, since it is larger than the sum of its proper divisors (2502223619).

12031300309 is an equidigital number, since it uses as much as digits as its factorization.

12031300309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82165 (or 82158 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 22.

The spelling of 12031300309 in words is "twelve billion, thirty-one million, three hundred thousand, three hundred nine".