2021100089 has 2 divisors, whose sum is σ = 2021100090. Its totient is φ = 2021100088.

The previous prime is 2021100077. The next prime is 2021100121. The reversal of 2021100089 is 9800011202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1334660089 + 686440000 = 36533^2 + 26200^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021100089 - 2⁴ = 2021100073 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021100019) 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, 1010550044 + 1010550045.

It is an arithmetic number, because the mean of its divisors is an integer number (1010550045).

Almost surely, 2^2021100089 is an apocalyptic number.

It is an amenable number.

2021100089 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021100089 is an equidigital number, since it uses as much as digits as its factorization.

2021100089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 2021100089 is about 44956.6467721960. The cubic root of 2021100089 is about 1264.3363001253.

The spelling of 2021100089 in words is "two billion, twenty-one million, one hundred thousand, eighty-nine".