21263242032233 has 2 divisors, whose sum is σ = 21263242032234. Its totient is φ = 21263242032232.

The previous prime is 21263242032211. The next prime is 21263242032257. The reversal of 21263242032233 is 33223024236212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20349770589184 + 913471443049 = 4511072^2 + 955757^2 .

It is a cyclic number.

It is not a de Polignac number, because 21263242032233 - 2²² = 21263237837929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21263242032193 and 21263242032202.

It is not a weakly prime, because it can be changed into another prime (21263242032533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10631621016116 + 10631621016117.

It is an arithmetic number, because the mean of its divisors is an integer number (10631621016117).

Almost surely, 2^{21263242032233} is an apocalyptic number.

It is an amenable number.

21263242032233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21263242032233 is an equidigital number, since it uses as much as digits as its factorization.

21263242032233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 35.

Adding to 21263242032233 its reverse (33223024236212), we get a palindrome (54486266268445).

The spelling of 21263242032233 in words is "twenty-one trillion, two hundred sixty-three billion, two hundred forty-two million, thirty-two thousand, two hundred thirty-three".