12221202424 has 8 divisors (see below), whose sum is σ = 22914754560. Its totient is φ = 6110601208.

The previous prime is 12221202419. The next prime is 12221202479. The reversal of 12221202424 is 42420212221.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 12221202395 and 12221202404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 763825144 + ... + 763825159.

It is an arithmetic number, because the mean of its divisors is an integer number (2864344320).

Almost surely, 2^12221202424 is an apocalyptic number.

It is an amenable number.

12221202424 is a deficient number, since it is larger than the sum of its proper divisors (10693552136).

12221202424 is a wasteful number, since it uses less digits than its factorization.

12221202424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527650309 (or 1527650305 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 12221202424 its reverse (42420212221), we get a palindrome (54641414645).

The spelling of 12221202424 in words is "twelve billion, two hundred twenty-one million, two hundred two thousand, four hundred twenty-four".