12211202309 has 2 divisors, whose sum is σ = 12211202310. Its totient is φ = 12211202308.

The previous prime is 12211202261. The next prime is 12211202387. The reversal of 12211202309 is 90320211221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8703957025 + 3507245284 = 93295^2 + 59222^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12211202309 is a prime.

It is a super-2 number, since 2×12211202309² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12211205309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105601154 + 6105601155.

It is an arithmetic number, because the mean of its divisors is an integer number (6105601155).

Almost surely, 2^12211202309 is an apocalyptic number.

It is an amenable number.

12211202309 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211202309 is an equidigital number, since it uses as much as digits as its factorization.

12211202309 is an evil number, because the sum of its binary digits is even.

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

The spelling of 12211202309 in words is "twelve billion, two hundred eleven million, two hundred two thousand, three hundred nine".