12232221331221 has 36 divisors (see below), whose sum is σ = 17963314937568. Its totient is φ = 8020964631888.

The previous prime is 12232221331201. The next prime is 12232221331241. The reversal of 12232221331221 is 12213312223221.

12232221331221 is a `hidden beast` number, since 1 + 2 + 2 + 322 + 2 + 1 + 3 + 312 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (12232221331201) and next prime (12232221331241).

It is not a de Polignac number, because 12232221331221 - 2⁷ = 12232221331093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12232221331201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 14358426 + ... + 15186468.

It is an arithmetic number, because the mean of its divisors is an integer number (498980970488).

Almost surely, 2^{12232221331221} is an apocalyptic number.

It is an amenable number.

12232221331221 is a deficient number, since it is larger than the sum of its proper divisors (5731093606347).

12232221331221 is an equidigital number, since it uses as much as digits as its factorization.

12232221331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828470 (or 828388 counting only the distinct ones).

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

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

The spelling of 12232221331221 in words is "twelve trillion, two hundred thirty-two billion, two hundred twenty-one million, three hundred thirty-one thousand, two hundred twenty-one".