21320001333233 has 2 divisors, whose sum is σ = 21320001333234. Its totient is φ = 21320001333232.

The previous prime is 21320001333229. The next prime is 21320001333299. The reversal of 21320001333233 is 33233310002312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20871438949729 + 448562383504 = 4568527^2 + 669748^2 .

It is a cyclic number.

It is not a de Polignac number, because 21320001333233 - 2² = 21320001333229 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (21320001333223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660000666616 + 10660000666617.

It is an arithmetic number, because the mean of its divisors is an integer number (10660000666617).

Almost surely, 2^{21320001333233} is an apocalyptic number.

It is an amenable number.

21320001333233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21320001333233 is an equidigital number, since it uses as much as digits as its factorization.

21320001333233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 26.

Adding to 21320001333233 its reverse (33233310002312), we get a palindrome (54553311335545).

The spelling of 21320001333233 in words is "twenty-one trillion, three hundred twenty billion, one million, three hundred thirty-three thousand, two hundred thirty-three".