21110543224 has 8 divisors (see below), whose sum is σ = 39582268560. Its totient is φ = 10555271608.

The previous prime is 21110543221. The next prime is 21110543297. The reversal of 21110543224 is 42234501112.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110543221) by changing a digit.

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, 1319408944 + ... + 1319408959.

It is an arithmetic number, because the mean of its divisors is an integer number (4947783570).

Almost surely, 2^21110543224 is an apocalyptic number.

It is an amenable number.

21110543224 is a deficient number, since it is larger than the sum of its proper divisors (18471725336).

21110543224 is a wasteful number, since it uses less digits than its factorization.

21110543224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2638817909 (or 2638817905 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The spelling of 21110543224 in words is "twenty-one billion, one hundred ten million, five hundred forty-three thousand, two hundred twenty-four".