21123424244204 has 48 divisors (see below), whose sum is σ = 39652337410560. Its totient is φ = 9823776842880.

The previous prime is 21123424244171. The next prime is 21123424244213. The reversal of 21123424244204 is 40244242432112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21672734 + ... + 22626405.

It is an arithmetic number, because the mean of its divisors is an integer number (826090362720).

Almost surely, 2^{21123424244204} is an apocalyptic number.

It is an amenable number.

21123424244204 is a deficient number, since it is larger than the sum of its proper divisors (18528913166356).

21123424244204 is a wasteful number, since it uses less digits than its factorization.

21123424244204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44299310 (or 44299308 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 35.

Adding to 21123424244204 its reverse (40244242432112), we get a palindrome (61367666676316).

The spelling of 21123424244204 in words is "twenty-one trillion, one hundred twenty-three billion, four hundred twenty-four million, two hundred forty-four thousand, two hundred four".