12205545100321 has 16 divisors (see below), whose sum is σ = 13010127911424. Its totient is φ = 11423899531264.

The previous prime is 12205545100313. The next prime is 12205545100337. The reversal of 12205545100321 is 12300154550221.

It is not a de Polignac number, because 12205545100321 - 2³ = 12205545100313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12205545100121) 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 15 ways as a sum of consecutive naturals, for example, 3551361 + ... + 6084673.

It is an arithmetic number, because the mean of its divisors is an integer number (813132994464).

Almost surely, 2^{12205545100321} is an apocalyptic number.

It is an amenable number.

12205545100321 is a deficient number, since it is larger than the sum of its proper divisors (804582811103).

12205545100321 is a wasteful number, since it uses less digits than its factorization.

12205545100321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2537840.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 12205545100321 its reverse (12300154550221), we get a palindrome (24505699650542).

The spelling of 12205545100321 in words is "twelve trillion, two hundred five billion, five hundred forty-five million, one hundred thousand, three hundred twenty-one".