12109903321 has 2 divisors, whose sum is σ = 12109903322. Its totient is φ = 12109903320.

The previous prime is 12109903319. The next prime is 12109903339. The reversal of 12109903321 is 12330990121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12109902025 + 1296 = 110045^2 + 36^2 .

It is a cyclic number.

It is not a de Polignac number, because 12109903321 - 2¹ = 12109903319 is a prime.

Together with 12109903319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12109903391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6054951660 + 6054951661.

It is an arithmetic number, because the mean of its divisors is an integer number (6054951661).

Almost surely, 2^12109903321 is an apocalyptic number.

It is an amenable number.

12109903321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12109903321 is an equidigital number, since it uses as much as digits as its factorization.

12109903321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 31.

The spelling of 12109903321 in words is "twelve billion, one hundred nine million, nine hundred three thousand, three hundred twenty-one".