21002122220033 has 2 divisors, whose sum is σ = 21002122220034. Its totient is φ = 21002122220032.

The previous prime is 21002122219999. The next prime is 21002122220063. The reversal of 21002122220033 is 33002222120012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16979402048449 + 4022720171584 = 4120607^2 + 2005672^2 .

It is a cyclic number.

It is not a de Polignac number, because 21002122220033 - 2⁴⁰ = 19902610592257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21002122219987 and 21002122220014.

It is not a weakly prime, because it can be changed into another prime (21002122220063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501061110016 + 10501061110017.

It is an arithmetic number, because the mean of its divisors is an integer number (10501061110017).

Almost surely, 2^{21002122220033} is an apocalyptic number.

It is an amenable number.

21002122220033 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002122220033 is an equidigital number, since it uses as much as digits as its factorization.

21002122220033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21002122220033 its reverse (33002222120012), we get a palindrome (54004344340045).

The spelling of 21002122220033 in words is "twenty-one trillion, two billion, one hundred twenty-two million, two hundred twenty thousand, thirty-three".