21227104424 has 16 divisors (see below), whose sum is σ = 41084718720. Its totient is φ = 10271179440.

The previous prime is 21227104357. The next prime is 21227104427. The reversal of 21227104424 is 42440172212.

It is not an unprimeable number, because it can be changed into a prime (21227104427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42796334 + ... + 42796829.

It is an arithmetic number, because the mean of its divisors is an integer number (2567794920).

Almost surely, 2^21227104424 is an apocalyptic number.

It is an amenable number.

21227104424 is a deficient number, since it is larger than the sum of its proper divisors (19857614296).

21227104424 is a wasteful number, since it uses less digits than its factorization.

21227104424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85593200 (or 85593196 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 29.

Adding to 21227104424 its reverse (42440172212), we get a palindrome (63667276636).

The spelling of 21227104424 in words is "twenty-one billion, two hundred twenty-seven million, one hundred four thousand, four hundred twenty-four".