1212110121197 has 2 divisors, whose sum is σ = 1212110121198. Its totient is φ = 1212110121196.

The previous prime is 1212110121193. The next prime is 1212110121251. The reversal of 1212110121197 is 7911210112121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 609353533321 + 602756587876 = 780611^2 + 776374^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212110121197 - 2² = 1212110121193 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212110121191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606055060598 + 606055060599.

It is an arithmetic number, because the mean of its divisors is an integer number (606055060599).

Almost surely, 2^{1212110121197} is an apocalyptic number.

It is an amenable number.

1212110121197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212110121197 is an equidigital number, since it uses as much as digits as its factorization.

1212110121197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 29.

The spelling of 1212110121197 in words is "one trillion, two hundred twelve billion, one hundred ten million, one hundred twenty-one thousand, one hundred ninety-seven".