12211210231321 has 2 divisors, whose sum is σ = 12211210231322. Its totient is φ = 12211210231320.

The previous prime is 12211210231307. The next prime is 12211210231331. The reversal of 12211210231321 is 12313201211221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12142513821321 + 68696410000 = 3484611^2 + 262100^2 .

It is a cyclic number.

It is not a de Polignac number, because 12211210231321 - 2⁹ = 12211210230809 is a prime.

It is a super-2 number, since 2×12211210231321² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12211210231292 and 12211210231301.

It is not a weakly prime, because it can be changed into another prime (12211210231331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105605115660 + 6105605115661.

It is an arithmetic number, because the mean of its divisors is an integer number (6105605115661).

Almost surely, 2^{12211210231321} is an apocalyptic number.

It is an amenable number.

12211210231321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211210231321 is an equidigital number, since it uses as much as digits as its factorization.

12211210231321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 12211210231321 its reverse (12313201211221), we get a palindrome (24524411442542).

The spelling of 12211210231321 in words is "twelve trillion, two hundred eleven billion, two hundred ten million, two hundred thirty-one thousand, three hundred twenty-one".