21230012333 has 2 divisors, whose sum is σ = 21230012334. Its totient is φ = 21230012332.

The previous prime is 21230012269. The next prime is 21230012381. The reversal of 21230012333 is 33321003212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20739744169 + 490268164 = 144013^2 + 22142^2 .

It is a cyclic number.

It is not a de Polignac number, because 21230012333 - 2⁶ = 21230012269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21230012833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615006166 + 10615006167.

It is an arithmetic number, because the mean of its divisors is an integer number (10615006167).

Almost surely, 2^21230012333 is an apocalyptic number.

It is an amenable number.

21230012333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230012333 is an equidigital number, since it uses as much as digits as its factorization.

21230012333 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21230012333 its reverse (33321003212), we get a palindrome (54551015545).

The spelling of 21230012333 in words is "twenty-one billion, two hundred thirty million, twelve thousand, three hundred thirty-three".