121221020200069 has 2 divisors, whose sum is σ = 121221020200070. Its totient is φ = 121221020200068.

The previous prime is 121221020200061. The next prime is 121221020200099. The reversal of 121221020200069 is 960002020122121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104749841459169 + 16471178740900 = 10234737^2 + 4058470^2 .

It is a cyclic number.

It is not a de Polignac number, because 121221020200069 - 2³ = 121221020200061 is a prime.

It is a super-2 number, since 2×121221020200069² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121221020200061) 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, 60610510100034 + 60610510100035.

It is an arithmetic number, because the mean of its divisors is an integer number (60610510100035).

Almost surely, 2^{121221020200069} is an apocalyptic number.

It is an amenable number.

121221020200069 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221020200069 is an equidigital number, since it uses as much as digits as its factorization.

121221020200069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 121221020200069 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty million, two hundred thousand, sixty-nine".