21313120332233 has 2 divisors, whose sum is σ = 21313120332234. Its totient is φ = 21313120332232.

The previous prime is 21313120332199. The next prime is 21313120332253. The reversal of 21313120332233 is 33223302131312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16260636872704 + 5052483459529 = 4032448^2 + 2247773^2 .

It is a cyclic number.

It is not a de Polignac number, because 21313120332233 - 2⁶ = 21313120332169 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21313120332196 and 21313120332205.

It is not a weakly prime, because it can be changed into another prime (21313120332253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656560166116 + 10656560166117.

It is an arithmetic number, because the mean of its divisors is an integer number (10656560166117).

Almost surely, 2^{21313120332233} is an apocalyptic number.

It is an amenable number.

21313120332233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21313120332233 is an equidigital number, since it uses as much as digits as its factorization.

21313120332233 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 21313120332233 its reverse (33223302131312), we get a palindrome (54536422463545).

The spelling of 21313120332233 in words is "twenty-one trillion, three hundred thirteen billion, one hundred twenty million, three hundred thirty-two thousand, two hundred thirty-three".