12211031009 has 2 divisors, whose sum is σ = 12211031010. Its totient is φ = 12211031008.

The previous prime is 12211030999. The next prime is 12211031029. The reversal of 12211031009 is 90013011221.

It is an a-pointer prime, because the next prime (12211031029) can be obtained adding 12211031009 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10228288225 + 1982742784 = 101135^2 + 44528^2 .

It is a cyclic number.

It is not a de Polignac number, because 12211031009 - 2⁸ = 12211030753 is a prime.

It is not a weakly prime, because it can be changed into another prime (12211031029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105515504 + 6105515505.

It is an arithmetic number, because the mean of its divisors is an integer number (6105515505).

Almost surely, 2^12211031009 is an apocalyptic number.

It is an amenable number.

12211031009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211031009 is an equidigital number, since it uses as much as digits as its factorization.

12211031009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The spelling of 12211031009 in words is "twelve billion, two hundred eleven million, thirty-one thousand, nine".