21210010224 has 40 divisors (see below), whose sum is σ = 59007337872. Its totient is φ = 6526156800.

The previous prime is 21210010223. The next prime is 21210010247. The reversal of 21210010224 is 42201001212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210010223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16994577 + ... + 16995824.

Almost surely, 2^21210010224 is an apocalyptic number.

21210010224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21210010224 is an abundant number, since it is smaller than the sum of its proper divisors (37797327648).

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

21210010224 is a wasteful number, since it uses less digits than its factorization.

21210010224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33990425 (or 33990419 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21210010224 its reverse (42201001212), we get a palindrome (63411011436).

The spelling of 21210010224 in words is "twenty-one billion, two hundred ten million, ten thousand, two hundred twenty-four".