12205550505 has 32 divisors (see below), whose sum is σ = 20598819840. Its totient is φ = 6154384320.

The previous prime is 12205550453. The next prime is 12205550509. The reversal of 12205550505 is 50505550221.

It is not a de Polignac number, because 12205550505 - 2¹¹ = 12205548457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12205550509) 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 31 ways as a sum of consecutive naturals, for example, 96324 + ... + 183546.

It is an arithmetic number, because the mean of its divisors is an integer number (643713120).

Almost surely, 2^12205550505 is an apocalyptic number.

12205550505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12205550505 is a deficient number, since it is larger than the sum of its proper divisors (8393269335).

12205550505 is a wasteful number, since it uses less digits than its factorization.

12205550505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87741.

The product of its (nonzero) digits is 12500, while the sum is 30.

The spelling of 12205550505 in words is "twelve billion, two hundred five million, five hundred fifty thousand, five hundred five".