21320113323233 has 2 divisors, whose sum is σ = 21320113323234. Its totient is φ = 21320113323232.

The previous prime is 21320113323109. The next prime is 21320113323287. The reversal of 21320113323233 is 33232331102312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18898252172944 + 2421861150289 = 4347212^2 + 1556233^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21320113323233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21320113323196 and 21320113323205.

It is not a weakly prime, because it can be changed into another prime (21320113329233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660056661616 + 10660056661617.

It is an arithmetic number, because the mean of its divisors is an integer number (10660056661617).

Almost surely, 2^{21320113323233} is an apocalyptic number.

It is an amenable number.

21320113323233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21320113323233 is an equidigital number, since it uses as much as digits as its factorization.

21320113323233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 29.

Adding to 21320113323233 its reverse (33232331102312), we get a palindrome (54552444425545).

The spelling of 21320113323233 in words is "twenty-one trillion, three hundred twenty billion, one hundred thirteen million, three hundred twenty-three thousand, two hundred thirty-three".