21331322113 has 2 divisors, whose sum is σ = 21331322114. Its totient is φ = 21331322112.

The previous prime is 21331322083. The next prime is 21331322143. The reversal of 21331322113 is 31122313312.

It is a balanced prime because it is at equal distance from previous prime (21331322083) and next prime (21331322143).

It can be written as a sum of positive squares in only one way, i.e., 21243937009 + 87385104 = 145753^2 + 9348^2 .

It is a cyclic number.

It is not a de Polignac number, because 21331322113 - 2¹⁷ = 21331191041 is a prime.

It is not a weakly prime, because it can be changed into another prime (21331322143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665661056 + 10665661057.

It is an arithmetic number, because the mean of its divisors is an integer number (10665661057).

Almost surely, 2^21331322113 is an apocalyptic number.

It is an amenable number.

21331322113 is a deficient number, since it is larger than the sum of its proper divisors (1).

21331322113 is an equidigital number, since it uses as much as digits as its factorization.

21331322113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 22.

Adding to 21331322113 its reverse (31122313312), we get a palindrome (52453635425).

The spelling of 21331322113 in words is "twenty-one billion, three hundred thirty-one million, three hundred twenty-two thousand, one hundred thirteen".