11212204309 has 2 divisors, whose sum is σ = 11212204310. Its totient is φ = 11212204308.

The previous prime is 11212204273. The next prime is 11212204319. The reversal of 11212204309 is 90340221211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9043439409 + 2168764900 = 95097^2 + 46570^2 .

It is a cyclic number.

It is not a de Polignac number, because 11212204309 - 2¹⁷ = 11212073237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11212204319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606102154 + 5606102155.

It is an arithmetic number, because the mean of its divisors is an integer number (5606102155).

Almost surely, 2^11212204309 is an apocalyptic number.

It is an amenable number.

11212204309 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212204309 is an equidigital number, since it uses as much as digits as its factorization.

11212204309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 11212204309 in words is "eleven billion, two hundred twelve million, two hundred four thousand, three hundred nine".