12221142443 has 4 divisors (see below), whose sum is σ = 12221566728. Its totient is φ = 12220718160.

The previous prime is 12221142421. The next prime is 12221142473. The reversal of 12221142443 is 34424112221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34424112221 = 71 ⋅484846651.

It is a cyclic number.

It is not a de Polignac number, because 12221142443 - 2⁶ = 12221142379 is a prime.

It is a super-2 number, since 2×12221142443² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221142473) 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, 165521 + ... + 227682.

It is an arithmetic number, because the mean of its divisors is an integer number (3055391682).

Almost surely, 2^12221142443 is an apocalyptic number.

12221142443 is a deficient number, since it is larger than the sum of its proper divisors (424285).

12221142443 is an equidigital number, since it uses as much as digits as its factorization.

12221142443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424284.

The product of its digits is 3072, while the sum is 26.

Adding to 12221142443 its reverse (34424112221), we get a palindrome (46645254664).

The spelling of 12221142443 in words is "twelve billion, two hundred twenty-one million, one hundred forty-two thousand, four hundred forty-three".