21300021130 has 16 divisors (see below), whose sum is σ = 38346936264. Its totient is φ = 8518475520.

The previous prime is 21300021101. The next prime is 21300021131. The reversal of 21300021130 is 3112000312.

It can be written as a sum of positive squares in 4 ways, for example, as 16202489521 + 5097531609 = 127289^2 + 71397^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21300021130.

It is not an unprimeable number, because it can be changed into a prime (21300021131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132387 + ... + 245206.

Almost surely, 2^21300021130 is an apocalyptic number.

21300021130 is a deficient number, since it is larger than the sum of its proper divisors (17046915134).

21300021130 is a wasteful number, since it uses less digits than its factorization.

21300021130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383241.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21300021130 its reverse (3112000312), we get a palindrome (24412021442).

The spelling of 21300021130 in words is "twenty-one billion, three hundred million, twenty-one thousand, one hundred thirty".