1212270197 has 2 divisors, whose sum is σ = 1212270198. Its totient is φ = 1212270196.

The previous prime is 1212270173. The next prime is 1212270203. The reversal of 1212270197 is 7910722121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1054365841 + 157904356 = 32471^2 + 12566^2 .

It is an emirp because it is prime and its reverse (7910722121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212270197 - 2⁶ = 1212270133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212270127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606135098 + 606135099.

It is an arithmetic number, because the mean of its divisors is an integer number (606135099).

Almost surely, 2^1212270197 is an apocalyptic number.

It is an amenable number.

1212270197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212270197 is an equidigital number, since it uses as much as digits as its factorization.

1212270197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 32.

The square root of 1212270197 is about 34817.6707578207. The cubic root of 1212270197 is about 1066.2682465896.

The spelling of 1212270197 in words is "one billion, two hundred twelve million, two hundred seventy thousand, one hundred ninety-seven".