21303003030013 has 4 divisors (see below), whose sum is σ = 21878759868700. Its totient is φ = 20727246191328.

The previous prime is 21303003030011. The next prime is 21303003030017. The reversal of 21303003030013 is 31003030030312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18530984486169 + 2772018543844 = 4304763^2 + 1664938^2 .

It is a cyclic number.

It is not a de Polignac number, because 21303003030013 - 2¹ = 21303003030011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303003030011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287878419288 + ... + 287878419361.

It is an arithmetic number, because the mean of its divisors is an integer number (5469689967175).

Almost surely, 2^{21303003030013} is an apocalyptic number.

It is an amenable number.

21303003030013 is a deficient number, since it is larger than the sum of its proper divisors (575756838687).

21303003030013 is an equidigital number, since it uses as much as digits as its factorization.

21303003030013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575756838686.

The product of its (nonzero) digits is 486, while the sum is 19.

Adding to 21303003030013 its reverse (31003030030312), we get a palindrome (52306033060325).

The spelling of 21303003030013 in words is "twenty-one trillion, three hundred three billion, three million, thirty thousand, thirteen".