222221121185617 has 2 divisors, whose sum is σ = 222221121185618. Its totient is φ = 222221121185616.

The previous prime is 222221121185527. The next prime is 222221121185671. The reversal of 222221121185617 is 716581121122222.

It is a happy number.

Together with next prime (222221121185671) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221304628968721 + 916492216896 = 14876311^2 + 957336^2 .

It is a cyclic number.

It is not a de Polignac number, because 222221121185617 - 2⁴⁷ = 81483632830289 is a prime.

It is not a weakly prime, because it can be changed into another prime (222221121185017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111110560592808 + 111110560592809.

It is an arithmetic number, because the mean of its divisors is an integer number (111110560592809).

Almost surely, 2^{222221121185617} is an apocalyptic number.

It is an amenable number.

222221121185617 is a deficient number, since it is larger than the sum of its proper divisors (1).

222221121185617 is an equidigital number, since it uses as much as digits as its factorization.

222221121185617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 43.

The spelling of 222221121185617 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred eighty-five thousand, six hundred seventeen".