12212202209 has 6 divisors (see below), whose sum is σ = 12647834550. Its totient is φ = 11791090976.

The previous prime is 12212202181. The next prime is 12212202239. The reversal of 12212202209 is 90220221221.

It can be written as a sum of positive squares in 3 ways, for example, as 1880089600 + 10332112609 = 43360^2 + 101647^2 .

It is not a de Polignac number, because 12212202209 - 2¹² = 12212198113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12212202239) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7259684 + ... + 7261365.

It is an arithmetic number, because the mean of its divisors is an integer number (2107972425).

Almost surely, 2^12212202209 is an apocalyptic number.

It is an amenable number.

12212202209 is a deficient number, since it is larger than the sum of its proper divisors (435632341).

12212202209 is an equidigital number, since it uses as much as digits as its factorization.

12212202209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14521107 (or 14521078 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 12212202209 in words is "twelve billion, two hundred twelve million, two hundred two thousand, two hundred nine".