1021111102189 has 2 divisors, whose sum is σ = 1021111102190. Its totient is φ = 1021111102188.

The previous prime is 1021111102177. The next prime is 1021111102373. The reversal of 1021111102189 is 9812011111201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1000700122500 + 20410979689 = 1000350^2 + 142867^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021111102189 - 2²⁹ = 1020574231277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021111102889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510555551094 + 510555551095.

It is an arithmetic number, because the mean of its divisors is an integer number (510555551095).

Almost surely, 2^{1021111102189} is an apocalyptic number.

It is an amenable number.

1021111102189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021111102189 is an equidigital number, since it uses as much as digits as its factorization.

1021111102189 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 28.

The spelling of 1021111102189 in words is "one trillion, twenty-one billion, one hundred eleven million, one hundred two thousand, one hundred eighty-nine".