12221031443 has 4 divisors (see below), whose sum is σ = 12294211440. Its totient is φ = 12147851448.

The previous prime is 12221031437. The next prime is 12221031463. The reversal of 12221031443 is 34413012221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12221031443 - 2⁶ = 12221031379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221031463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36589748 + ... + 36590081.

It is an arithmetic number, because the mean of its divisors is an integer number (3073552860).

Almost surely, 2^12221031443 is an apocalyptic number.

12221031443 is a deficient number, since it is larger than the sum of its proper divisors (73179997).

12221031443 is an equidigital number, since it uses as much as digits as its factorization.

12221031443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73179996.

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

Adding to 12221031443 its reverse (34413012221), we get a palindrome (46634043664).

The spelling of 12221031443 in words is "twelve billion, two hundred twenty-one million, thirty-one thousand, four hundred forty-three".