1210111222189 has 2 divisors, whose sum is σ = 1210111222190. Its totient is φ = 1210111222188.

The previous prime is 1210111222153. The next prime is 1210111222237. The reversal of 1210111222189 is 9812221110121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1011321866025 + 198789356164 = 1005645^2 + 445858^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210111222189 - 2⁹ = 1210111221677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1210111222189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210111222589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605055611094 + 605055611095.

It is an arithmetic number, because the mean of its divisors is an integer number (605055611095).

Almost surely, 2^{1210111222189} is an apocalyptic number.

It is an amenable number.

1210111222189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210111222189 is an equidigital number, since it uses as much as digits as its factorization.

1210111222189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 31.

The spelling of 1210111222189 in words is "one trillion, two hundred ten billion, one hundred eleven million, two hundred twenty-two thousand, one hundred eighty-nine".