221012021033 has 2 divisors, whose sum is σ = 221012021034. Its totient is φ = 221012021032.

The previous prime is 221012020981. The next prime is 221012021039. The reversal of 221012021033 is 330120210122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204849475609 + 16162545424 = 452603^2 + 127132^2 .

It is a cyclic number.

It is not a de Polignac number, because 221012021033 - 2¹⁸ = 221011758889 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 (221012021039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110506010516 + 110506010517.

It is an arithmetic number, because the mean of its divisors is an integer number (110506010517).

Almost surely, 2^221012021033 is an apocalyptic number.

It is an amenable number.

221012021033 is a deficient number, since it is larger than the sum of its proper divisors (1).

221012021033 is an equidigital number, since it uses as much as digits as its factorization.

221012021033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 221012021033 its reverse (330120210122), we get a palindrome (551132231155).

The spelling of 221012021033 in words is "two hundred twenty-one billion, twelve million, twenty-one thousand, thirty-three".