1211333012189 has 2 divisors, whose sum is σ = 1211333012190. Its totient is φ = 1211333012188.

The previous prime is 1211333012171. The next prime is 1211333012221. The reversal of 1211333012189 is 9812103331121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1085420167225 + 125912844964 = 1041835^2 + 354842^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211333012189 - 2¹⁶ = 1211332946653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211333012119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605666506094 + 605666506095.

It is an arithmetic number, because the mean of its divisors is an integer number (605666506095).

Almost surely, 2^{1211333012189} is an apocalyptic number.

It is an amenable number.

1211333012189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211333012189 is an equidigital number, since it uses as much as digits as its factorization.

1211333012189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 1211333012189 in words is "one trillion, two hundred eleven billion, three hundred thirty-three million, twelve thousand, one hundred eighty-nine".