12213311320205 has 4 divisors (see below), whose sum is σ = 14655973584252. Its totient is φ = 9770649056160.

The previous prime is 12213311320201. The next prime is 12213311320211. The reversal of 12213311320205 is 50202311331221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5601732772804 + 6611578547401 = 2366798^2 + 2571299^2 .

It is not a de Polignac number, because 12213311320205 - 2² = 12213311320201 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213311320201) 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, 1221331132016 + ... + 1221331132025.

It is an arithmetic number, because the mean of its divisors is an integer number (3663993396063).

Almost surely, 2^{12213311320205} is an apocalyptic number.

It is an amenable number.

12213311320205 is a deficient number, since it is larger than the sum of its proper divisors (2442662264047).

12213311320205 is an equidigital number, since it uses as much as digits as its factorization.

12213311320205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2442662264046.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 12213311320205 its reverse (50202311331221), we get a palindrome (62415622651426).

The spelling of 12213311320205 in words is "twelve trillion, two hundred thirteen billion, three hundred eleven million, three hundred twenty thousand, two hundred five".