21510331130 has 8 divisors (see below), whose sum is σ = 38718596052. Its totient is φ = 8604132448.

The previous prime is 21510331123. The next prime is 21510331177. The reversal of 21510331130 is 3113301512.

It can be written as a sum of positive squares in 2 ways, for example, as 21071135281 + 439195849 = 145159^2 + 20957^2 .

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

It is an unprimeable number.

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, 1075516547 + ... + 1075516566.

Almost surely, 2^21510331130 is an apocalyptic number.

21510331130 is a deficient number, since it is larger than the sum of its proper divisors (17208264922).

21510331130 is a wasteful number, since it uses less digits than its factorization.

21510331130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151033120.

The product of its (nonzero) digits is 270, while the sum is 20.

Adding to 21510331130 its reverse (3113301512), we get a palindrome (24623632642).

The spelling of 21510331130 in words is "twenty-one billion, five hundred ten million, three hundred thirty-one thousand, one hundred thirty".