222303121022221 has 2 divisors, whose sum is σ = 222303121022222. Its totient is φ = 222303121022220.

The previous prime is 222303121022189. The next prime is 222303121022293. The reversal of 222303121022221 is 122220121303222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177105924853225 + 45197196168996 = 13308115^2 + 6722886^2 .

It is a cyclic number.

It is not a de Polignac number, because 222303121022221 - 2⁵ = 222303121022189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222303121020221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111151560511110 + 111151560511111.

It is an arithmetic number, because the mean of its divisors is an integer number (111151560511111).

Almost surely, 2^{222303121022221} is an apocalyptic number.

It is an amenable number.

222303121022221 is a deficient number, since it is larger than the sum of its proper divisors (1).

222303121022221 is an equidigital number, since it uses as much as digits as its factorization.

222303121022221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 222303121022221 its reverse (122220121303222), we get a palindrome (344523242325443).

The spelling of 222303121022221 in words is "two hundred twenty-two trillion, three hundred three billion, one hundred twenty-one million, twenty-two thousand, two hundred twenty-one".