21034313233 has 2 divisors, whose sum is σ = 21034313234. Its totient is φ = 21034313232.

The previous prime is 21034313219. The next prime is 21034313239. The reversal of 21034313233 is 33231343012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17823051009 + 3211262224 = 133503^2 + 56668^2 .

It is a cyclic number.

It is not a de Polignac number, because 21034313233 - 2²⁹ = 20497442321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21034313198 and 21034313207.

It is not a weakly prime, because it can be changed into another prime (21034313239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10517156616 + 10517156617.

It is an arithmetic number, because the mean of its divisors is an integer number (10517156617).

Almost surely, 2^21034313233 is an apocalyptic number.

It is an amenable number.

21034313233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21034313233 is an equidigital number, since it uses as much as digits as its factorization.

21034313233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 21034313233 its reverse (33231343012), we get a palindrome (54265656245).

The spelling of 21034313233 in words is "twenty-one billion, thirty-four million, three hundred thirteen thousand, two hundred thirty-three".