21201045200 has 30 divisors (see below), whose sum is σ = 50935512054. Its totient is φ = 8480417920.

The previous prime is 21201045193. The next prime is 21201045233. The reversal of 21201045200 is 254010212.

It can be written as a sum of positive squares in 3 ways, for example, as 4431831184 + 16769214016 = 66572^2 + 129496^2 .

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 5 ways as a sum of consecutive naturals, for example, 26500907 + ... + 26501706.

Almost surely, 2^21201045200 is an apocalyptic number.

21201045200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21201045200 is an abundant number, since it is smaller than the sum of its proper divisors (29734466854).

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

21201045200 is a wasteful number, since it uses less digits than its factorization.

21201045200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53002631 (or 53002620 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 21201045200 its reverse (254010212), we get a palindrome (21455055412).

The spelling of 21201045200 in words is "twenty-one billion, two hundred one million, forty-five thousand, two hundred".