222230121221 has 2 divisors, whose sum is σ = 222230121222. Its totient is φ = 222230121220.

The previous prime is 222230121181. The next prime is 222230121229. The reversal of 222230121221 is 122121032222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193164645025 + 29065476196 = 439505^2 + 170486^2 .

It is a cyclic number.

It is not a de Polignac number, because 222230121221 - 2³⁴ = 205050252037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222230121193 and 222230121202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222230121229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111115060610 + 111115060611.

It is an arithmetic number, because the mean of its divisors is an integer number (111115060611).

Almost surely, 2^222230121221 is an apocalyptic number.

It is an amenable number.

222230121221 is a deficient number, since it is larger than the sum of its proper divisors (1).

222230121221 is an equidigital number, since it uses as much as digits as its factorization.

222230121221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 222230121221 its reverse (122121032222), we get a palindrome (344351153443).

The spelling of 222230121221 in words is "two hundred twenty-two billion, two hundred thirty million, one hundred twenty-one thousand, two hundred twenty-one".