121002100002169 has 2 divisors, whose sum is σ = 121002100002170. Its totient is φ = 121002100002168.

The previous prime is 121002100002149. The next prime is 121002100002191. The reversal of 121002100002169 is 961200001200121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81913595675769 + 39088504326400 = 9050613^2 + 6252080^2 .

It is a cyclic number.

It is not a de Polignac number, because 121002100002169 - 2⁷ = 121002100002041 is a prime.

It is a super-2 number, since 2×121002100002169² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121002100002149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60501050001084 + 60501050001085.

It is an arithmetic number, because the mean of its divisors is an integer number (60501050001085).

Almost surely, 2^{121002100002169} is an apocalyptic number.

It is an amenable number.

121002100002169 is a deficient number, since it is larger than the sum of its proper divisors (1).

121002100002169 is an equidigital number, since it uses as much as digits as its factorization.

121002100002169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 121002100002169 in words is "one hundred twenty-one trillion, two billion, one hundred million, two thousand, one hundred sixty-nine".