223032312221 has 2 divisors, whose sum is σ = 223032312222. Its totient is φ = 223032312220.

The previous prime is 223032312163. The next prime is 223032312257. The reversal of 223032312221 is 122213230322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150609967225 + 72422344996 = 388085^2 + 269114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223032312221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223032312521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111516156110 + 111516156111.

It is an arithmetic number, because the mean of its divisors is an integer number (111516156111).

Almost surely, 2^223032312221 is an apocalyptic number.

It is an amenable number.

223032312221 is a deficient number, since it is larger than the sum of its proper divisors (1).

223032312221 is an equidigital number, since it uses as much as digits as its factorization.

223032312221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 223032312221 its reverse (122213230322), we get a palindrome (345245542543).

The spelling of 223032312221 in words is "two hundred twenty-three billion, thirty-two million, three hundred twelve thousand, two hundred twenty-one".