12203222121218 has 8 divisors (see below), whose sum is σ = 18304860966348. Its totient is φ = 6101601799104.

The previous prime is 12203222121217. The next prime is 12203222121313. The reversal of 12203222121218 is 81212122230221.

It can be written as a sum of positive squares in 2 ways, for example, as 11358942311809 + 844279809409 = 3370303^2 + 918847^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12203222121217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2846171 + ... + 5701502.

Almost surely, 2^{12203222121218} is an apocalyptic number.

12203222121218 is a deficient number, since it is larger than the sum of its proper divisors (6101638845130).

12203222121218 is an equidigital number, since it uses as much as digits as its factorization.

12203222121218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9261508.

The product of its (nonzero) digits is 3072, while the sum is 29.

Adding to 12203222121218 its reverse (81212122230221), we get a palindrome (93415344351439).

The spelling of 12203222121218 in words is "twelve trillion, two hundred three billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred eighteen".