21224110552 has 8 divisors (see below), whose sum is σ = 39795207300. Its totient is φ = 10612055272.

The previous prime is 21224110543. The next prime is 21224110561. The reversal of 21224110552 is 25501142212.

It is an interprime number because it is at equal distance from previous prime (21224110543) and next prime (21224110561).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1326506902 + ... + 1326506917.

Almost surely, 2^21224110552 is an apocalyptic number.

It is an amenable number.

21224110552 is a deficient number, since it is larger than the sum of its proper divisors (18571096748).

21224110552 is a wasteful number, since it uses less digits than its factorization.

21224110552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2653013825 (or 2653013821 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 21224110552 its reverse (25501142212), we get a palindrome (46725252764).

The spelling of 21224110552 in words is "twenty-one billion, two hundred twenty-four million, one hundred ten thousand, five hundred fifty-two".