12221230224 has 40 divisors (see below), whose sum is σ = 36081728320. Its totient is φ = 3491779968.

The previous prime is 12221230211. The next prime is 12221230237. The reversal of 12221230224 is 42203212221.

It is an interprime number because it is at equal distance from previous prime (12221230211) and next prime (12221230237).

It is a super-2 number, since 2×12221230224² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 12221230224.

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, 18186019 + ... + 18186690.

It is an arithmetic number, because the mean of its divisors is an integer number (902043208).

Almost surely, 2^12221230224 is an apocalyptic number.

12221230224 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12221230224 is an abundant number, since it is smaller than the sum of its proper divisors (23860498096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12221230224 is a wasteful number, since it uses less digits than its factorization.

12221230224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36372727 (or 36372721 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 12221230224 its reverse (42203212221), we get a palindrome (54424442445).

The spelling of 12221230224 in words is "twelve billion, two hundred twenty-one million, two hundred thirty thousand, two hundred twenty-four".