121221000097 has 2 divisors, whose sum is σ = 121221000098. Its totient is φ = 121221000096.

The previous prime is 121221000079. The next prime is 121221000149. The reversal of 121221000097 is 790000122121.

Together with previous prime (121221000079) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91818696256 + 29402303841 = 303016^2 + 171471^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121221000097 is a prime.

It is not a weakly prime, because it can be changed into another prime (121221000077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610500048 + 60610500049.

It is an arithmetic number, because the mean of its divisors is an integer number (60610500049).

Almost surely, 2^121221000097 is an apocalyptic number.

It is an amenable number.

121221000097 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221000097 is an equidigital number, since it uses as much as digits as its factorization.

121221000097 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 25.

The spelling of 121221000097 in words is "one hundred twenty-one billion, two hundred twenty-one million, ninety-seven", and thus it is an aban number.