12209945611 has 4 divisors (see below), whose sum is σ = 12210904224. Its totient is φ = 12208987000.

The previous prime is 12209945609. The next prime is 12209945633. The reversal of 12209945611 is 11654990221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12209945611 - 2¹ = 12209945609 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12209945681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459940 + ... + 485761.

It is an arithmetic number, because the mean of its divisors is an integer number (3052726056).

Almost surely, 2^12209945611 is an apocalyptic number.

12209945611 is a deficient number, since it is larger than the sum of its proper divisors (958613).

12209945611 is an equidigital number, since it uses as much as digits as its factorization.

12209945611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958612.

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 12209945611 in words is "twelve billion, two hundred nine million, nine hundred forty-five thousand, six hundred eleven".