121312302197 has 2 divisors, whose sum is σ = 121312302198. Its totient is φ = 121312302196.

The previous prime is 121312302187. The next prime is 121312302217. The reversal of 121312302197 is 791203213121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78284682436 + 43027619761 = 279794^2 + 207431^2 .

It is a cyclic number.

It is not a de Polignac number, because 121312302197 - 2¹² = 121312298101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121312302187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60656151098 + 60656151099.

It is an arithmetic number, because the mean of its divisors is an integer number (60656151099).

Almost surely, 2^121312302197 is an apocalyptic number.

It is an amenable number.

121312302197 is a deficient number, since it is larger than the sum of its proper divisors (1).

121312302197 is an equidigital number, since it uses as much as digits as its factorization.

121312302197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

The spelling of 121312302197 in words is "one hundred twenty-one billion, three hundred twelve million, three hundred two thousand, one hundred ninety-seven".