121002100002191 has 2 divisors, whose sum is σ = 121002100002192. Its totient is φ = 121002100002190.

The previous prime is 121002100002169. The next prime is 121002100002209. The reversal of 121002100002191 is 191200001200121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121002100002191 - 2¹⁴ = 121002099985807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121002100002131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60501050001095 + 60501050001096.

It is an arithmetic number, because the mean of its divisors is an integer number (60501050001096).

Almost surely, 2^{121002100002191} is an apocalyptic number.

121002100002191 is a deficient number, since it is larger than the sum of its proper divisors (1).

121002100002191 is an equidigital number, since it uses as much as digits as its factorization.

121002100002191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 121002100002191 in words is "one hundred twenty-one trillion, two billion, one hundred million, two thousand, one hundred ninety-one".