21110120033 has 2 divisors, whose sum is σ = 21110120034. Its totient is φ = 21110120032.

The previous prime is 21110120029. The next prime is 21110120047. The reversal of 21110120033 is 33002101112.

It is an a-pointer prime, because the next prime (21110120047) can be obtained adding 21110120033 to its sum of digits (14).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18342097489 + 2768022544 = 135433^2 + 52612^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110120033 - 2² = 21110120029 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 (21110120093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555060016 + 10555060017.

It is an arithmetic number, because the mean of its divisors is an integer number (10555060017).

Almost surely, 2^21110120033 is an apocalyptic number.

It is an amenable number.

21110120033 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110120033 is an equidigital number, since it uses as much as digits as its factorization.

21110120033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21110120033 its reverse (33002101112), we get a palindrome (54112221145).

The spelling of 21110120033 in words is "twenty-one billion, one hundred ten million, one hundred twenty thousand, thirty-three".