12321202109 has 2 divisors, whose sum is σ = 12321202110. Its totient is φ = 12321202108.

The previous prime is 12321202093. The next prime is 12321202121. The reversal of 12321202109 is 90120212321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8547557209 + 3773644900 = 92453^2 + 61430^2 .

It is a cyclic number.

It is not a de Polignac number, because 12321202109 - 2⁴ = 12321202093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12321202129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160601054 + 6160601055.

It is an arithmetic number, because the mean of its divisors is an integer number (6160601055).

Almost surely, 2^12321202109 is an apocalyptic number.

It is an amenable number.

12321202109 is a deficient number, since it is larger than the sum of its proper divisors (1).

12321202109 is an equidigital number, since it uses as much as digits as its factorization.

12321202109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 12321202109 in words is "twelve billion, three hundred twenty-one million, two hundred two thousand, one hundred nine".