221323001033 has 2 divisors, whose sum is σ = 221323001034. Its totient is φ = 221323001032.

The previous prime is 221323000993. The next prime is 221323001099. The reversal of 221323001033 is 330100323122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150693028864 + 70629972169 = 388192^2 + 265763^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221323001033 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221323000996 and 221323001014.

It is not a weakly prime, because it can be changed into another prime (221323001233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110661500516 + 110661500517.

It is an arithmetic number, because the mean of its divisors is an integer number (110661500517).

Almost surely, 2^221323001033 is an apocalyptic number.

It is an amenable number.

221323001033 is a deficient number, since it is larger than the sum of its proper divisors (1).

221323001033 is an equidigital number, since it uses as much as digits as its factorization.

221323001033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 221323001033 its reverse (330100323122), we get a palindrome (551423324155).

The spelling of 221323001033 in words is "two hundred twenty-one billion, three hundred twenty-three million, one thousand, thirty-three".