1230120197 has 2 divisors, whose sum is σ = 1230120198. Its totient is φ = 1230120196.

The previous prime is 1230120193. The next prime is 1230120209. The reversal of 1230120197 is 7910210321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 956912356 + 273207841 = 30934^2 + 16529^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230120197 - 2² = 1230120193 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1230120191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615060098 + 615060099.

It is an arithmetic number, because the mean of its divisors is an integer number (615060099).

Almost surely, 2^1230120197 is an apocalyptic number.

It is an amenable number.

1230120197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230120197 is an equidigital number, since it uses as much as digits as its factorization.

1230120197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 1230120197 is about 35073.0693980439. The cubic root of 1230120197 is about 1071.4761693741.

The spelling of 1230120197 in words is "one billion, two hundred thirty million, one hundred twenty thousand, one hundred ninety-seven".