21011224304 has 60 divisors (see below), whose sum is σ = 48988661400. Its totient is φ = 8694290304.

The previous prime is 21011224279. The next prime is 21011224313. The reversal of 21011224304 is 40342211012.

It is a super-3 number, since 3×21011224304³ (a number of 32 digits) contains 333 as substring.

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 in 11 ways as a sum of consecutive naturals, for example, 439334 + ... + 484805.

It is an arithmetic number, because the mean of its divisors is an integer number (816477690).

Almost surely, 2^21011224304 is an apocalyptic number.

It is an amenable number.

21011224304 is an abundant number, since it is smaller than the sum of its proper divisors (27977437096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21011224304 is a wasteful number, since it uses less digits than its factorization.

21011224304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924190 (or 924177 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21011224304 its reverse (40342211012), we get a palindrome (61353435316).

The spelling of 21011224304 in words is "twenty-one billion, eleven million, two hundred twenty-four thousand, three hundred four".