1212231224189 has 2 divisors, whose sum is σ = 1212231224190. Its totient is φ = 1212231224188.

The previous prime is 1212231224167. The next prime is 1212231224263. The reversal of 1212231224189 is 9814221322121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1051582568089 + 160648656100 = 1025467^2 + 400810^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212231224189 - 2⁸ = 1212231223933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212231224119) 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, 606115612094 + 606115612095.

It is an arithmetic number, because the mean of its divisors is an integer number (606115612095).

Almost surely, 2^{1212231224189} is an apocalyptic number.

It is an amenable number.

1212231224189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212231224189 is an equidigital number, since it uses as much as digits as its factorization.

1212231224189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 38.

The spelling of 1212231224189 in words is "one trillion, two hundred twelve billion, two hundred thirty-one million, two hundred twenty-four thousand, one hundred eighty-nine".