12221231424 has 112 divisors (see below), whose sum is σ = 34653614208. Its totient is φ = 3791259648.

The previous prime is 12221231411. The next prime is 12221231431. The reversal of 12221231424 is 42413212221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 12221231394 and 12221231403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125994 + ... + 200790.

Almost surely, 2^12221231424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12221231424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17326807104).

12221231424 is an abundant number, since it is smaller than the sum of its proper divisors (22432382784).

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

12221231424 is a wasteful number, since it uses less digits than its factorization.

12221231424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74872 (or 74862 counting only the distinct ones).

The product of its digits is 1536, while the sum is 24.

Adding to 12221231424 its reverse (42413212221), we get a palindrome (54634443645).

The spelling of 12221231424 in words is "twelve billion, two hundred twenty-one million, two hundred thirty-one thousand, four hundred twenty-four".