12211452443 has 4 divisors (see below), whose sum is σ = 12632537040. Its totient is φ = 11790367848.

The previous prime is 12211452401. The next prime is 12211452467. The reversal of 12211452443 is 34425411221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34425411221 = 79 ⋅435764699.

It is a cyclic number.

It is not a de Polignac number, because 12211452443 - 2¹⁰ = 12211451419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 421084567 = 12211452443 / (1 + 2 + 2 + 1 + 1 + 4 + 5 + 2 + 4 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12211452943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210542255 + ... + 210542312.

It is an arithmetic number, because the mean of its divisors is an integer number (3158134260).

Almost surely, 2^12211452443 is an apocalyptic number.

12211452443 is a deficient number, since it is larger than the sum of its proper divisors (421084597).

12211452443 is an equidigital number, since it uses as much as digits as its factorization.

12211452443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421084596.

The product of its digits is 7680, while the sum is 29.

Adding to 12211452443 its reverse (34425411221), we get a palindrome (46636863664).

The spelling of 12211452443 in words is "twelve billion, two hundred eleven million, four hundred fifty-two thousand, four hundred forty-three".