1213420553197 has 2 divisors, whose sum is σ = 1213420553198. Its totient is φ = 1213420553196.

The previous prime is 1213420553069. The next prime is 1213420553243. The reversal of 1213420553197 is 7913550243121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1123527921156 + 89892632041 = 1059966^2 + 299821^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213420553197 - 2⁷ = 1213420553069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213420553797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606710276598 + 606710276599.

It is an arithmetic number, because the mean of its divisors is an integer number (606710276599).

Almost surely, 2^{1213420553197} is an apocalyptic number.

It is an amenable number.

1213420553197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213420553197 is an equidigital number, since it uses as much as digits as its factorization.

1213420553197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 1213420553197 in words is "one trillion, two hundred thirteen billion, four hundred twenty million, five hundred fifty-three thousand, one hundred ninety-seven".