12221403224 has 32 divisors (see below), whose sum is σ = 24277125600. Its totient is φ = 5747919360.

The previous prime is 12221403199. The next prime is 12221403263. The reversal of 12221403224 is 42230412221.

It is a self number, because there is not a number n which added to its sum of digits gives 12221403224.

It is a congruent number.

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, 218189 + ... + 268419.

It is an arithmetic number, because the mean of its divisors is an integer number (758660175).

Almost surely, 2^12221403224 is an apocalyptic number.

It is an amenable number.

12221403224 is a deficient number, since it is larger than the sum of its proper divisors (12055722376).

12221403224 is a wasteful number, since it uses less digits than its factorization.

12221403224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52043 (or 52039 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 12221403224 its reverse (42230412221), we get a palindrome (54451815445).

The spelling of 12221403224 in words is "twelve billion, two hundred twenty-one million, four hundred three thousand, two hundred twenty-four".