223310320021 has 2 divisors, whose sum is σ = 223310320022. Its totient is φ = 223310320020.

The previous prime is 223310319983. The next prime is 223310320031. The reversal of 223310320021 is 120023013322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187046735121 + 36263584900 = 432489^2 + 190430^2 .

It is a cyclic number.

It is not a de Polignac number, because 223310320021 - 2¹⁷ = 223310188949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223310320031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111655160010 + 111655160011.

It is an arithmetic number, because the mean of its divisors is an integer number (111655160011).

Almost surely, 2^223310320021 is an apocalyptic number.

It is an amenable number.

223310320021 is a deficient number, since it is larger than the sum of its proper divisors (1).

223310320021 is an equidigital number, since it uses as much as digits as its factorization.

223310320021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 223310320021 its reverse (120023013322), we get a palindrome (343333333343).

The spelling of 223310320021 in words is "two hundred twenty-three billion, three hundred ten million, three hundred twenty thousand, twenty-one".