21110300033 has 2 divisors, whose sum is σ = 21110300034. Its totient is φ = 21110300032.

The previous prime is 21110300017. The next prime is 21110300053. The reversal of 21110300033 is 33000301112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13606755904 + 7503544129 = 116648^2 + 86623^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110300033 - 2⁴ = 21110300017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21110299990 and 21110300017.

It is not a weakly prime, because it can be changed into another prime (21110300053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555150016 + 10555150017.

It is an arithmetic number, because the mean of its divisors is an integer number (10555150017).

Almost surely, 2^21110300033 is an apocalyptic number.

It is an amenable number.

21110300033 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110300033 is an equidigital number, since it uses as much as digits as its factorization.

21110300033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 21110300033 its reverse (33000301112), we get a palindrome (54110601145).

The spelling of 21110300033 in words is "twenty-one billion, one hundred ten million, three hundred thousand, thirty-three".