21030240130 has 8 divisors (see below), whose sum is σ = 37854432252. Its totient is φ = 8412096048.

The previous prime is 21030240107. The next prime is 21030240131. The reversal of 21030240130 is 3104203012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19481738929 + 1548501201 = 139577^2 + 39351^2 .

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 (21030240131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1051511997 + ... + 1051512016.

Almost surely, 2^21030240130 is an apocalyptic number.

21030240130 is a deficient number, since it is larger than the sum of its proper divisors (16824192122).

21030240130 is a wasteful number, since it uses less digits than its factorization.

21030240130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2103024020.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21030240130 its reverse (3104203012), we get a palindrome (24134443142).

The spelling of 21030240130 in words is "twenty-one billion, thirty million, two hundred forty thousand, one hundred thirty".