21000321130 has 8 divisors (see below), whose sum is σ = 37800578052. Its totient is φ = 8400128448.

The previous prime is 21000321127. The next prime is 21000321151. The reversal of 21000321130 is 3112300012.

It can be written as a sum of positive squares in 2 ways, for example, as 19202476329 + 1797844801 = 138573^2 + 42401^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21000321130.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050016047 + ... + 1050016066.

Almost surely, 2^21000321130 is an apocalyptic number.

21000321130 is a deficient number, since it is larger than the sum of its proper divisors (16800256922).

21000321130 is a wasteful number, since it uses less digits than its factorization.

21000321130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100032120.

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

Adding to 21000321130 its reverse (3112300012), we get a palindrome (24112621142).

The spelling of 21000321130 in words is "twenty-one billion, three hundred twenty-one thousand, one hundred thirty".