21413201224 has 16 divisors (see below), whose sum is σ = 42511502700. Its totient is φ = 10076800512.

The previous prime is 21413201177. The next prime is 21413201239. The reversal of 21413201224 is 42210231412.

It can be written as a sum of positive squares in 2 ways, for example, as 20813832900 + 599368324 = 144270^2 + 24482^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21413201195 and 21413201204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78724869 + ... + 78725140.

Almost surely, 2^21413201224 is an apocalyptic number.

It is an amenable number.

21413201224 is a deficient number, since it is larger than the sum of its proper divisors (21098301476).

21413201224 is a wasteful number, since it uses less digits than its factorization.

21413201224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157450032 (or 157450028 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21413201224 its reverse (42210231412), we get a palindrome (63623432636).

The spelling of 21413201224 in words is "twenty-one billion, four hundred thirteen million, two hundred one thousand, two hundred twenty-four".