12215049309 has 12 divisors (see below), whose sum is σ = 17645131452. Its totient is φ = 8142825600.

The previous prime is 12215049293. The next prime is 12215049317. The reversal of 12215049309 is 90394051221.

12215049309 is a `hidden beast` number, since 12 + 2 + 150 + 493 + 0 + 9 = 666.

12215049309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11535404409 + 679644900 = 107403^2 + 26070^2 .

It is not a de Polignac number, because 12215049309 - 2⁴ = 12215049293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12215049409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136599 + ... + 207579.

It is an arithmetic number, because the mean of its divisors is an integer number (1470427621).

Almost surely, 2^12215049309 is an apocalyptic number.

It is an amenable number.

12215049309 is a deficient number, since it is larger than the sum of its proper divisors (5430082143).

12215049309 is a wasteful number, since it uses less digits than its factorization.

12215049309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90108 (or 90105 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The spelling of 12215049309 in words is "twelve billion, two hundred fifteen million, forty-nine thousand, three hundred nine".