12221343424 has 56 divisors (see below), whose sum is σ = 24387048000. Its totient is φ = 6076692480.

The previous prime is 12221343403. The next prime is 12221343443. The reversal of 12221343424 is 42434312221.

It is a super-2 number, since 2×12221343424² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12221343392 and 12221343401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16059204 + ... + 16059964.

It is an arithmetic number, because the mean of its divisors is an integer number (435483000).

Almost surely, 2^12221343424 is an apocalyptic number.

It is an amenable number.

12221343424 is a deficient number, since it is larger than the sum of its proper divisors (12165704576).

12221343424 is an equidigital number, since it uses as much as digits as its factorization.

12221343424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841 (or 1831 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

Adding to 12221343424 its reverse (42434312221), we get a palindrome (54655655645).

The spelling of 12221343424 in words is "twelve billion, two hundred twenty-one million, three hundred forty-three thousand, four hundred twenty-four".