222121221120989 has 2 divisors, whose sum is σ = 222121221120990. Its totient is φ = 222121221120988.

The previous prime is 222121221120941. The next prime is 222121221121001. The reversal of 222121221120989 is 989021122121222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117972399480100 + 104148821640889 = 10861510^2 + 10205333^2 .

It is a cyclic number.

It is not a de Polignac number, because 222121221120989 - 2⁴⁴ = 204529035076573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222121221120289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060610560494 + 111060610560495.

It is an arithmetic number, because the mean of its divisors is an integer number (111060610560495).

Almost surely, 2^{222121221120989} is an apocalyptic number.

It is an amenable number.

222121221120989 is a deficient number, since it is larger than the sum of its proper divisors (1).

222121221120989 is an equidigital number, since it uses as much as digits as its factorization.

222121221120989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 44.

The spelling of 222121221120989 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty thousand, nine hundred eighty-nine".