21330103221305 has 16 divisors (see below), whose sum is σ = 25851185003664. Its totient is φ = 16894063180800.

The previous prime is 21330103221269. The next prime is 21330103221367. The reversal of 21330103221305 is 50312230103312.

It can be written as a sum of positive squares in 8 ways, for example, as 2089782489664 + 19240320731641 = 1445608^2 + 4386379^2 .

It is not a de Polignac number, because 21330103221305 - 2¹⁰ = 21330103220281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6708917 + ... + 9363213.

It is an arithmetic number, because the mean of its divisors is an integer number (1615699062729).

Almost surely, 2^{21330103221305} is an apocalyptic number.

It is an amenable number.

21330103221305 is a deficient number, since it is larger than the sum of its proper divisors (4521081782359).

21330103221305 is a wasteful number, since it uses less digits than its factorization.

21330103221305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2670316.

The product of its (nonzero) digits is 3240, while the sum is 26.

Adding to 21330103221305 its reverse (50312230103312), we get a palindrome (71642333324617).

The spelling of 21330103221305 in words is "twenty-one trillion, three hundred thirty billion, one hundred three million, two hundred twenty-one thousand, three hundred five".