20003223221 has 2 divisors, whose sum is σ = 20003223222. Its totient is φ = 20003223220.

The previous prime is 20003223217. The next prime is 20003223283. The reversal of 20003223221 is 12232230002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13372378321 + 6630844900 = 115639^2 + 81430^2 .

It is a cyclic number.

It is not a de Polignac number, because 20003223221 - 2² = 20003223217 is a prime.

It is a super-2 number, since 2×20003223221² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20003223221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20003223421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001611610 + 10001611611.

It is an arithmetic number, because the mean of its divisors is an integer number (10001611611).

Almost surely, 2^20003223221 is an apocalyptic number.

It is an amenable number.

20003223221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20003223221 is an equidigital number, since it uses as much as digits as its factorization.

20003223221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 20003223221 its reverse (12232230002), we get a palindrome (32235453223).

The spelling of 20003223221 in words is "twenty billion, three million, two hundred twenty-three thousand, two hundred twenty-one".