223221030320261 has 2 divisors, whose sum is σ = 223221030320262. Its totient is φ = 223221030320260.

The previous prime is 223221030320213. The next prime is 223221030320269. The reversal of 223221030320261 is 162023030122322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122555306020900 + 100665724299361 = 11070470^2 + 10033231^2 .

It is a cyclic number.

It is not a de Polignac number, because 223221030320261 - 2³⁸ = 222946152413317 is a prime.

It is a super-3 number, since 3×223221030320261³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223221030320269) 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, 111610515160130 + 111610515160131.

It is an arithmetic number, because the mean of its divisors is an integer number (111610515160131).

Almost surely, 2^{223221030320261} is an apocalyptic number.

It is an amenable number.

223221030320261 is a deficient number, since it is larger than the sum of its proper divisors (1).

223221030320261 is an equidigital number, since it uses as much as digits as its factorization.

223221030320261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 223221030320261 its reverse (162023030122322), we get a palindrome (385244060442583).

The spelling of 223221030320261 in words is "two hundred twenty-three trillion, two hundred twenty-one billion, thirty million, three hundred twenty thousand, two hundred sixty-one".