21302211313 has 4 divisors (see below), whose sum is σ = 21302511088. Its totient is φ = 21301911540.

The previous prime is 21302211251. The next prime is 21302211331. The reversal of 21302211313 is 31311220312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21302211313 - 2¹³ = 21302203121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21302211373) 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, 23770 + ... + 207772.

It is an arithmetic number, because the mean of its divisors is an integer number (5325627772).

Almost surely, 2^21302211313 is an apocalyptic number.

It is an amenable number.

21302211313 is a deficient number, since it is larger than the sum of its proper divisors (299775).

21302211313 is a wasteful number, since it uses less digits than its factorization.

21302211313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299774.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21302211313 its reverse (31311220312), we get a palindrome (52613431625).

The spelling of 21302211313 in words is "twenty-one billion, three hundred two million, two hundred eleven thousand, three hundred thirteen".