121121112187 has 2 divisors, whose sum is σ = 121121112188. Its totient is φ = 121121112186.

The previous prime is 121121112169. The next prime is 121121112191. The reversal of 121121112187 is 781211121121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121121112187 is a prime.

It is not a weakly prime, because it can be changed into another prime (121121112487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60560556093 + 60560556094.

It is an arithmetic number, because the mean of its divisors is an integer number (60560556094).

Almost surely, 2^121121112187 is an apocalyptic number.

121121112187 is a deficient number, since it is larger than the sum of its proper divisors (1).

121121112187 is an equidigital number, since it uses as much as digits as its factorization.

121121112187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 448, while the sum is 28.

The spelling of 121121112187 in words is "one hundred twenty-one billion, one hundred twenty-one million, one hundred twelve thousand, one hundred eighty-seven".