21111224033 has 2 divisors, whose sum is σ = 21111224034. Its totient is φ = 21111224032.

The previous prime is 21111224027. The next prime is 21111224039. The reversal of 21111224033 is 33042211112.

It is a balanced prime because it is at equal distance from previous prime (21111224027) and next prime (21111224039).

It can be written as a sum of positive squares in only one way, i.e., 14523142144 + 6588081889 = 120512^2 + 81167^2 .

It is a cyclic number.

It is not a de Polignac number, because 21111224033 - 2¹² = 21111219937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21111223996 and 21111224014.

It is not a weakly prime, because it can be changed into another prime (21111224039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555612016 + 10555612017.

It is an arithmetic number, because the mean of its divisors is an integer number (10555612017).

Almost surely, 2^21111224033 is an apocalyptic number.

It is an amenable number.

21111224033 is a deficient number, since it is larger than the sum of its proper divisors (1).

21111224033 is an equidigital number, since it uses as much as digits as its factorization.

21111224033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21111224033 its reverse (33042211112), we get a palindrome (54153435145).

The spelling of 21111224033 in words is "twenty-one billion, one hundred eleven million, two hundred twenty-four thousand, thirty-three".