21224030044042 has 32 divisors (see below), whose sum is σ = 36687415248000. Its totient is φ = 9020369193408.

The previous prime is 21224030044033. The next prime is 21224030044067. The reversal of 21224030044042 is 24044003042212.

It is a self number, because there is not a number n which added to its sum of digits gives 21224030044042.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6927273 + ... + 9509740.

It is an arithmetic number, because the mean of its divisors is an integer number (1146481726500).

Almost surely, 2^{21224030044042} is an apocalyptic number.

21224030044042 is a deficient number, since it is larger than the sum of its proper divisors (15463385203958).

21224030044042 is a wasteful number, since it uses less digits than its factorization.

21224030044042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16437790.

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 21224030044042 its reverse (24044003042212), we get a palindrome (45268033086254).

The spelling of 21224030044042 in words is "twenty-one trillion, two hundred twenty-four billion, thirty million, forty-four thousand, forty-two".