21000221222033 has 2 divisors, whose sum is σ = 21000221222034. Its totient is φ = 21000221222032.

The previous prime is 21000221221979. The next prime is 21000221222047. The reversal of 21000221222033 is 33022212200012.

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., 18482578944769 + 2517642277264 = 4299137^2 + 1586708^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21000221222033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21000221221996 and 21000221222014.

It is not a weakly prime, because it can be changed into another prime (21000221222083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500110611016 + 10500110611017.

It is an arithmetic number, because the mean of its divisors is an integer number (10500110611017).

Almost surely, 2^{21000221222033} is an apocalyptic number.

It is an amenable number.

21000221222033 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000221222033 is an equidigital number, since it uses as much as digits as its factorization.

21000221222033 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 21000221222033 its reverse (33022212200012), we get a palindrome (54022433422045).

The spelling of 21000221222033 in words is "twenty-one trillion, two hundred twenty-one million, two hundred twenty-two thousand, thirty-three".