21430340012033 has 2 divisors, whose sum is σ = 21430340012034. Its totient is φ = 21430340012032.

The previous prime is 21430340012027. The next prime is 21430340012069. The reversal of 21430340012033 is 33021004303412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13905232176784 + 7525107835249 = 3728972^2 + 2743193^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21430340012033 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 = 21430340011993 and 21430340012011.

It is not a weakly prime, because it can be changed into another prime (21430340612033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10715170006016 + 10715170006017.

It is an arithmetic number, because the mean of its divisors is an integer number (10715170006017).

Almost surely, 2^{21430340012033} is an apocalyptic number.

It is an amenable number.

21430340012033 is a deficient number, since it is larger than the sum of its proper divisors (1).

21430340012033 is an equidigital number, since it uses as much as digits as its factorization.

21430340012033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 21430340012033 its reverse (33021004303412), we get a palindrome (54451344315445).

The spelling of 21430340012033 in words is "twenty-one trillion, four hundred thirty billion, three hundred forty million, twelve thousand, thirty-three".