121221010209997 has 2 divisors, whose sum is σ = 121221010209998. Its totient is φ = 121221010209996.

The previous prime is 121221010209913. The next prime is 121221010210073. The reversal of 121221010209997 is 799902010122121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111542620767876 + 9678389442121 = 10561374^2 + 3111011^2 .

It is a cyclic number.

It is not a de Polignac number, because 121221010209997 - 2⁷ = 121221010209869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121221010209907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610505104998 + 60610505104999.

It is an arithmetic number, because the mean of its divisors is an integer number (60610505104999).

Almost surely, 2^{121221010209997} is an apocalyptic number.

It is an amenable number.

121221010209997 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221010209997 is an equidigital number, since it uses as much as digits as its factorization.

121221010209997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 46.

The spelling of 121221010209997 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, ten million, two hundred nine thousand, nine hundred ninety-seven".