121110000091 has 2 divisors, whose sum is σ = 121110000092. Its totient is φ = 121110000090.

The previous prime is 121110000083. The next prime is 121110000103. The reversal of 121110000091 is 190000011121.

It is a weak prime.

It is an emirp because it is prime and its reverse (190000011121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121110000091 - 2³ = 121110000083 is a prime.

It is not a weakly prime, because it can be changed into another prime (121110001091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60555000045 + 60555000046.

It is an arithmetic number, because the mean of its divisors is an integer number (60555000046).

Almost surely, 2^121110000091 is an apocalyptic number.

121110000091 is a deficient number, since it is larger than the sum of its proper divisors (1).

121110000091 is an equidigital number, since it uses as much as digits as its factorization.

121110000091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 16.

The spelling of 121110000091 in words is "one hundred twenty-one billion, one hundred ten million, ninety-one", and thus it is an aban number.