121002000191 has 2 divisors, whose sum is σ = 121002000192. Its totient is φ = 121002000190.

The previous prime is 121002000179. The next prime is 121002000209. The reversal of 121002000191 is 191000200121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121002000191 - 2¹⁴ = 121001983807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121002008191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60501000095 + 60501000096.

It is an arithmetic number, because the mean of its divisors is an integer number (60501000096).

Almost surely, 2^121002000191 is an apocalyptic number.

121002000191 is a deficient number, since it is larger than the sum of its proper divisors (1).

121002000191 is an equidigital number, since it uses as much as digits as its factorization.

121002000191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 121002000191 in words is "one hundred twenty-one billion, two million, one hundred ninety-one", and thus it is an aban number.