21001303130 has 16 divisors (see below), whose sum is σ = 37806647400. Its totient is φ = 8399565312.

The previous prime is 21001303123. The next prime is 21001303177. The reversal of 21001303130 is 3130310012.

It can be written as a sum of positive squares in 4 ways, for example, as 3620308561 + 17380994569 = 60169^2 + 131837^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23555 + ... + 206294.

Almost surely, 2^21001303130 is an apocalyptic number.

21001303130 is a deficient number, since it is larger than the sum of its proper divisors (16805344270).

21001303130 is a wasteful number, since it uses less digits than its factorization.

21001303130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238993.

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 21001303130 its reverse (3130310012), we get a palindrome (24131613142).

The spelling of 21001303130 in words is "twenty-one billion, one million, three hundred three thousand, one hundred thirty".