121000012201091 has 2 divisors, whose sum is σ = 121000012201092. Its totient is φ = 121000012201090.

The previous prime is 121000012201001. The next prime is 121000012201093. The reversal of 121000012201091 is 190102210000121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121000012201091 - 2²⁶ = 120999945092227 is a prime.

Together with 121000012201093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121000012201093) 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, 60500006100545 + 60500006100546.

It is an arithmetic number, because the mean of its divisors is an integer number (60500006100546).

Almost surely, 2^{121000012201091} is an apocalyptic number.

121000012201091 is a deficient number, since it is larger than the sum of its proper divisors (1).

121000012201091 is an equidigital number, since it uses as much as digits as its factorization.

121000012201091 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 121000012201091 in words is "one hundred twenty-one trillion, twelve million, two hundred one thousand, ninety-one".