12213312223221 has 96 divisors (see below), whose sum is σ = 18451417420800. Its totient is φ = 7777872829440.

The previous prime is 12213312223199. The next prime is 12213312223247. The reversal of 12213312223221 is 12232221331221.

12213312223221 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 3 + 312 + 22 + 322 + 1 = 666.

It is not a de Polignac number, because 12213312223221 - 2³⁷ = 12075873269749 is a prime.

It is a super-2 number, since 2×12213312223221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213312223271) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8895346891 + ... + 8895348263.

It is an arithmetic number, because the mean of its divisors is an integer number (192202264800).

Almost surely, 2^{12213312223221} is an apocalyptic number.

It is an amenable number.

12213312223221 is a deficient number, since it is larger than the sum of its proper divisors (6238105197579).

12213312223221 is a wasteful number, since it uses less digits than its factorization.

12213312223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2811 (or 2808 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 12213312223221 its reverse (12232221331221), we get a palindrome (24445533554442).

The spelling of 12213312223221 in words is "twelve trillion, two hundred thirteen billion, three hundred twelve million, two hundred twenty-three thousand, two hundred twenty-one".