12221212343 has 2 divisors, whose sum is σ = 12221212344. Its totient is φ = 12221212342.

The previous prime is 12221212327. The next prime is 12221212373. The reversal of 12221212343 is 34321212221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12221212343 - 2⁴ = 12221212327 is a prime.

It is a super-2 number, since 2×12221212343² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12221212303) 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 as a sum of consecutive naturals, namely, 6110606171 + 6110606172.

It is an arithmetic number, because the mean of its divisors is an integer number (6110606172).

Almost surely, 2^12221212343 is an apocalyptic number.

12221212343 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221212343 is an equidigital number, since it uses as much as digits as its factorization.

12221212343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 23.

Adding to 12221212343 its reverse (34321212221), we get a palindrome (46542424564).

The spelling of 12221212343 in words is "twelve billion, two hundred twenty-one million, two hundred twelve thousand, three hundred forty-three".