12209506057 has 24 divisors (see below), whose sum is σ = 14454554760. Its totient is φ = 10280309760.

The previous prime is 12209506051. The next prime is 12209506121. The reversal of 12209506057 is 75060590221.

It can be written as a sum of positive squares in 4 ways, for example, as 704583936 + 11504922121 = 26544^2 + 107261^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12209506057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12209506051) 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 23 ways as a sum of consecutive naturals, for example, 2774583 + ... + 2778979.

It is an arithmetic number, because the mean of its divisors is an integer number (602273115).

Almost surely, 2^12209506057 is an apocalyptic number.

It is an amenable number.

12209506057 is a deficient number, since it is larger than the sum of its proper divisors (2245048703).

12209506057 is an equidigital number, since it uses as much as digits as its factorization.

12209506057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5401 (or 5394 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 37.

The spelling of 12209506057 in words is "twelve billion, two hundred nine million, five hundred six thousand, fifty-seven".