12211210009 has 2 divisors, whose sum is σ = 12211210010. Its totient is φ = 12211210008.

The previous prime is 12211209991. The next prime is 12211210043. The reversal of 12211210009 is 90001211221.

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., 10016006400 + 2195203609 = 100080^2 + 46853^2 .

It is an emirp because it is prime and its reverse (90001211221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12211210009 - 2¹³ = 12211201817 is a prime.

It is a super-2 number, since 2×12211210009² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12211211009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105605004 + 6105605005.

It is an arithmetic number, because the mean of its divisors is an integer number (6105605005).

Almost surely, 2^12211210009 is an apocalyptic number.

It is an amenable number.

12211210009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211210009 is an equidigital number, since it uses as much as digits as its factorization.

12211210009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 12211210009 in words is "twelve billion, two hundred eleven million, two hundred ten thousand, nine".