1222211323889 has 2 divisors, whose sum is σ = 1222211323890. Its totient is φ = 1222211323888.

The previous prime is 1222211323867. The next prime is 1222211323919. The reversal of 1222211323889 is 9883231122221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1110125640625 + 112085683264 = 1053625^2 + 334792^2 .

It is an emirp because it is prime and its reverse (9883231122221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222211323889 - 2⁸ = 1222211323633 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222211323829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611105661944 + 611105661945.

It is an arithmetic number, because the mean of its divisors is an integer number (611105661945).

Almost surely, 2^{1222211323889} is an apocalyptic number.

It is an amenable number.

1222211323889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222211323889 is an equidigital number, since it uses as much as digits as its factorization.

1222211323889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 44.

The spelling of 1222211323889 in words is "one trillion, two hundred twenty-two billion, two hundred eleven million, three hundred twenty-three thousand, eight hundred eighty-nine".