1201222111189 has 2 divisors, whose sum is σ = 1201222111190. Its totient is φ = 1201222111188.

The previous prime is 1201222111181. The next prime is 1201222111207. The reversal of 1201222111189 is 9811112221021.

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., 1187790460164 + 13431651025 = 1089858^2 + 115895^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201222111189 - 2³ = 1201222111181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1201222111189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201222111181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600611055594 + 600611055595.

It is an arithmetic number, because the mean of its divisors is an integer number (600611055595).

Almost surely, 2^{1201222111189} is an apocalyptic number.

It is an amenable number.

1201222111189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201222111189 is an equidigital number, since it uses as much as digits as its factorization.

1201222111189 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 1201222111189 in words is "one trillion, two hundred one billion, two hundred twenty-two million, one hundred eleven thousand, one hundred eighty-nine".