223201236221 has 2 divisors, whose sum is σ = 223201236222. Its totient is φ = 223201236220.

The previous prime is 223201236197. The next prime is 223201236229. The reversal of 223201236221 is 122632102322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112969932100 + 110231304121 = 336110^2 + 332011^2 .

It is a cyclic number.

It is not a de Polignac number, because 223201236221 - 2²² = 223197041917 is a prime.

It is a super-3 number, since 3×223201236221³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223201236229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111600618110 + 111600618111.

It is an arithmetic number, because the mean of its divisors is an integer number (111600618111).

Almost surely, 2^223201236221 is an apocalyptic number.

It is an amenable number.

223201236221 is a deficient number, since it is larger than the sum of its proper divisors (1).

223201236221 is an equidigital number, since it uses as much as digits as its factorization.

223201236221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 223201236221 its reverse (122632102322), we get a palindrome (345833338543).

The spelling of 223201236221 in words is "two hundred twenty-three billion, two hundred one million, two hundred thirty-six thousand, two hundred twenty-one".