12031322309 has 2 divisors, whose sum is σ = 12031322310. Its totient is φ = 12031322308.

The previous prime is 12031322231. The next prime is 12031322311. The reversal of 12031322309 is 90322313021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11832653284 + 198669025 = 108778^2 + 14095^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12031322309 is a prime.

Together with 12031322311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12031322339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6015661154 + 6015661155.

It is an arithmetic number, because the mean of its divisors is an integer number (6015661155).

Almost surely, 2^12031322309 is an apocalyptic number.

It is an amenable number.

12031322309 is a deficient number, since it is larger than the sum of its proper divisors (1).

12031322309 is an equidigital number, since it uses as much as digits as its factorization.

12031322309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 26.

The spelling of 12031322309 in words is "twelve billion, thirty-one million, three hundred twenty-two thousand, three hundred nine".