21200003130 has 32 divisors (see below), whose sum is σ = 51524064000. Its totient is φ = 5581772352.

The previous prime is 21200003087. The next prime is 21200003137. The reversal of 21200003130 is 3130000212.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21200003137) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4470205 + ... + 4474944.

It is an arithmetic number, because the mean of its divisors is an integer number (1610127000).

Almost surely, 2^21200003130 is an apocalyptic number.

21200003130 is an abundant number, since it is smaller than the sum of its proper divisors (30324060870).

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

21200003130 is a wasteful number, since it uses less digits than its factorization.

21200003130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8945238.

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 21200003130 its reverse (3130000212), we get a palindrome (24330003342).

The spelling of 21200003130 in words is "twenty-one billion, two hundred million, three thousand, one hundred thirty".