21301333313 has 4 divisors (see below), whose sum is σ = 22939897428. Its totient is φ = 19662769200.

The previous prime is 21301333301. The next prime is 21301333327. The reversal of 21301333313 is 31333310312.

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 6923404849 + 14377928464 = 83207^2 + 119908^2 .

It is a cyclic number.

It is not a de Polignac number, because 21301333313 - 2¹⁰ = 21301332289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21301333343) 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, 819282038 + ... + 819282063.

It is an arithmetic number, because the mean of its divisors is an integer number (5734974357).

Almost surely, 2^21301333313 is an apocalyptic number.

It is an amenable number.

21301333313 is a deficient number, since it is larger than the sum of its proper divisors (1638564115).

21301333313 is a wasteful number, since it uses less digits than its factorization.

21301333313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638564114.

The product of its (nonzero) digits is 1458, while the sum is 23.

Adding to 21301333313 its reverse (31333310312), we get a palindrome (52634643625).

The spelling of 21301333313 in words is "twenty-one billion, three hundred one million, three hundred thirty-three thousand, three hundred thirteen".