222122313221 has 2 divisors, whose sum is σ = 222122313222. Its totient is φ = 222122313220.

The previous prime is 222122313209. The next prime is 222122313227. The reversal of 222122313221 is 122313221222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190869376996 + 31252936225 = 436886^2 + 176785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222122313221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222122313227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111061156610 + 111061156611.

It is an arithmetic number, because the mean of its divisors is an integer number (111061156611).

Almost surely, 2^222122313221 is an apocalyptic number.

It is an amenable number.

222122313221 is a deficient number, since it is larger than the sum of its proper divisors (1).

222122313221 is an equidigital number, since it uses as much as digits as its factorization.

222122313221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 23.

Adding to 222122313221 its reverse (122313221222), we get a palindrome (344435534443).

The spelling of 222122313221 in words is "two hundred twenty-two billion, one hundred twenty-two million, three hundred thirteen thousand, two hundred twenty-one".