21220344302233 has 2 divisors, whose sum is σ = 21220344302234. Its totient is φ = 21220344302232.

The previous prime is 21220344302219. The next prime is 21220344302239. The reversal of 21220344302233 is 33220344302212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11700175984704 + 9520168317529 = 3420552^2 + 3085477^2 .

It is a cyclic number.

It is not a de Polignac number, because 21220344302233 - 2²¹ = 21220342205081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21220344302195 and 21220344302204.

It is not a weakly prime, because it can be changed into another prime (21220344302239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610172151116 + 10610172151117.

It is an arithmetic number, because the mean of its divisors is an integer number (10610172151117).

Almost surely, 2^{21220344302233} is an apocalyptic number.

It is an amenable number.

21220344302233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220344302233 is an equidigital number, since it uses as much as digits as its factorization.

21220344302233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 21220344302233 its reverse (33220344302212), we get a palindrome (54440688604445).

The spelling of 21220344302233 in words is "twenty-one trillion, two hundred twenty billion, three hundred forty-four million, three hundred two thousand, two hundred thirty-three".