21003021130 has 128 divisors (see below), whose sum is σ = 47702753280. Its totient is φ = 6480656640.

The previous prime is 21003021071. The next prime is 21003021139. The reversal of 21003021130 is 3112030012.

It is a super-2 number, since 2×21003021130² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 21003021130.

It is not an unprimeable number, because it can be changed into a prime (21003021139) 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 63 ways as a sum of consecutive naturals, for example, 13300681 + ... + 13302259.

It is an arithmetic number, because the mean of its divisors is an integer number (372677760).

Almost surely, 2^21003021130 is an apocalyptic number.

21003021130 is an abundant number, since it is smaller than the sum of its proper divisors (26699732150).

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

21003021130 is a wasteful number, since it uses less digits than its factorization.

21003021130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964.

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

Adding to 21003021130 its reverse (3112030012), we get a palindrome (24115051142).

The spelling of 21003021130 in words is "twenty-one billion, three million, twenty-one thousand, one hundred thirty".