21113342353 has 2 divisors, whose sum is σ = 21113342354. Its totient is φ = 21113342352.

The previous prime is 21113342339. The next prime is 21113342357. The reversal of 21113342353 is 35324331112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20418123664 + 695218689 = 142892^2 + 26367^2 .

It is a cyclic number.

It is not a de Polignac number, because 21113342353 - 2⁹ = 21113341841 is a prime.

It is not a weakly prime, because it can be changed into another prime (21113342357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556671176 + 10556671177.

It is an arithmetic number, because the mean of its divisors is an integer number (10556671177).

Almost surely, 2^21113342353 is an apocalyptic number.

It is an amenable number.

21113342353 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113342353 is an equidigital number, since it uses as much as digits as its factorization.

21113342353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 28.

Adding to 21113342353 its reverse (35324331112), we get a palindrome (56437673465).

The spelling of 21113342353 in words is "twenty-one billion, one hundred thirteen million, three hundred forty-two thousand, three hundred fifty-three".