121121001999089 has 2 divisors, whose sum is σ = 121121001999090. Its totient is φ = 121121001999088.

The previous prime is 121121001999073. The next prime is 121121001999121. The reversal of 121121001999089 is 980999100121121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112546998139489 + 8574003859600 = 10608817^2 + 2928140^2 .

It is a cyclic number.

It is not a de Polignac number, because 121121001999089 - 2⁴ = 121121001999073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121121001999089.

It is not a weakly prime, because it can be changed into another prime (121121001999889) 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, 60560500999544 + 60560500999545.

It is an arithmetic number, because the mean of its divisors is an integer number (60560500999545).

Almost surely, 2^{121121001999089} is an apocalyptic number.

It is an amenable number.

121121001999089 is a deficient number, since it is larger than the sum of its proper divisors (1).

121121001999089 is an equidigital number, since it uses as much as digits as its factorization.

121121001999089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 53.

The spelling of 121121001999089 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, one million, nine hundred ninety-nine thousand, eighty-nine".