21013113130 has 8 divisors (see below), whose sum is σ = 37823603652. Its totient is φ = 8405245248.

The previous prime is 21013113127. The next prime is 21013113131. The reversal of 21013113130 is 3131131012.

It can be written as a sum of positive squares in 2 ways, for example, as 20509963369 + 503149761 = 143213^2 + 22431^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21013113131) 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 3 ways as a sum of consecutive naturals, for example, 1050655647 + ... + 1050655666.

Almost surely, 2^21013113130 is an apocalyptic number.

21013113130 is a deficient number, since it is larger than the sum of its proper divisors (16810490522).

21013113130 is a wasteful number, since it uses less digits than its factorization.

21013113130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101311320.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 21013113130 its reverse (3131131012), we get a palindrome (24144244142).

The spelling of 21013113130 in words is "twenty-one billion, thirteen million, one hundred thirteen thousand, one hundred thirty".