21222300231313 has 4 divisors (see below), whose sum is σ = 21222309638068. Its totient is φ = 21222290824560.

The previous prime is 21222300231281. The next prime is 21222300231329. The reversal of 21222300231313 is 31313200322212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2467450339344 + 18754849891969 = 1570812^2 + 4330687^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222300231313 - 2⁵ = 21222300231281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222300231113) 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, 929095 + ... + 6580867.

It is an arithmetic number, because the mean of its divisors is an integer number (5305577409517).

Almost surely, 2^{21222300231313} is an apocalyptic number.

It is an amenable number.

21222300231313 is a deficient number, since it is larger than the sum of its proper divisors (9406755).

21222300231313 is an equidigital number, since it uses as much as digits as its factorization.

21222300231313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9406754.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21222300231313 its reverse (31313200322212), we get a palindrome (52535500553525).

The spelling of 21222300231313 in words is "twenty-one trillion, two hundred twenty-two billion, three hundred million, two hundred thirty-one thousand, three hundred thirteen".