21103331303224 has 8 divisors (see below), whose sum is σ = 39568746193560. Its totient is φ = 10551665651608.

The previous prime is 21103331303161. The next prime is 21103331303233. The reversal of 21103331303224 is 42230313330112.

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

It is a junction number, because it is equal to n+sod(n) for n = 21103331303192 and 21103331303201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1318958206444 + ... + 1318958206459.

It is an arithmetic number, because the mean of its divisors is an integer number (4946093274195).

Almost surely, 2^{21103331303224} is an apocalyptic number.

It is an amenable number.

21103331303224 is a deficient number, since it is larger than the sum of its proper divisors (18465414890336).

21103331303224 is a wasteful number, since it uses less digits than its factorization.

21103331303224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637916412909 (or 2637916412905 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 21103331303224 its reverse (42230313330112), we get a palindrome (63333644633336).

The spelling of 21103331303224 in words is "twenty-one trillion, one hundred three billion, three hundred thirty-one million, three hundred three thousand, two hundred twenty-four".