12221100424 has 32 divisors (see below), whose sum is σ = 25528167000. Its totient is φ = 5446006272.

The previous prime is 12221100421. The next prime is 12221100431. The reversal of 12221100424 is 42400112221.

It can be written as a sum of positive squares in 4 ways, for example, as 7882243524 + 4338856900 = 88782^2 + 65870^2 .

It is not an unprimeable number, because it can be changed into a prime (12221100421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2023029 + ... + 2029060.

Almost surely, 2^12221100424 is an apocalyptic number.

It is an amenable number.

12221100424 is an abundant number, since it is smaller than the sum of its proper divisors (13307066576).

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

12221100424 is a wasteful number, since it uses less digits than its factorization.

12221100424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4052137 (or 4052133 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 12221100424 its reverse (42400112221), we get a palindrome (54621212645).

The spelling of 12221100424 in words is "twelve billion, two hundred twenty-one million, one hundred thousand, four hundred twenty-four".