21203044130 has 32 divisors (see below), whose sum is σ = 40810644720. Its totient is φ = 7903283200.

The previous prime is 21203044103. The next prime is 21203044141. The reversal of 21203044130 is 3144030212.

It can be written as a sum of positive squares in 8 ways, for example, as 20993981449 + 209062681 = 144893^2 + 14459^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 600275 + ... + 634614.

Almost surely, 2^21203044130 is an apocalyptic number.

21203044130 is a deficient number, since it is larger than the sum of its proper divisors (19607600590).

21203044130 is a wasteful number, since it uses less digits than its factorization.

21203044130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235014.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21203044130 its reverse (3144030212), we get a palindrome (24347074342).

The spelling of 21203044130 in words is "twenty-one billion, two hundred three million, forty-four thousand, one hundred thirty".