221001321000233 has 2 divisors, whose sum is σ = 221001321000234. Its totient is φ = 221001321000232.

The previous prime is 221001321000199. The next prime is 221001321000277. The reversal of 221001321000233 is 332000123100122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220966203364624 + 35117635609 = 14864932^2 + 187397^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221001321000233 is a prime.

It is not a weakly prime, because it can be changed into another prime (221001321050233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500660500116 + 110500660500117.

It is an arithmetic number, because the mean of its divisors is an integer number (110500660500117).

Almost surely, 2^{221001321000233} is an apocalyptic number.

It is an amenable number.

221001321000233 is a deficient number, since it is larger than the sum of its proper divisors (1).

221001321000233 is an equidigital number, since it uses as much as digits as its factorization.

221001321000233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 221001321000233 its reverse (332000123100122), we get a palindrome (553001444100355).

The spelling of 221001321000233 in words is "two hundred twenty-one trillion, one billion, three hundred twenty-one million, two hundred thirty-three", and thus it is an aban number.